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1[[quoteright:350:[[VideoGame/SuperMarioWorld https://static.tvtropes.org/pmwiki/pub/images/smw_beach_koopa.png]]]]
2[[caption-width-right:350:Clothes optional.]]
3
4In RealLife, a turtle's shell is fused to its spine (It is, after all, a modified ''rib cage''). Removing a shell in real life, if possible at all, will result in BloodyHorror for the poor chelonian, killing it in seconds if the turtle is lucky. But in fiction, it is often treated as a removable article of clothing. Expect the turtle, when out of the shell, to be wearing little more than GoofyPrintUnderwear ([[NakedPeopleAreFunny or sometimes even less than that]]).
5
6Alternately, the shell may be large enough to not only accommodate the resident turtle, but also allow somebody else to hide inside it at the same time. In some cases, the Removable Shell may also be portrayed as having a ''furnished apartment'' (and often BiggerOnTheInside). Another variant will be for the turtle to withdraw all of its limbs (and its head) to make them pop out so that it does a 180 degree turn without moving from the spot. Slow animals with removed shells may [[ShedArmorGainSpeed become much faster]].
7
8A variant can apply to other shelled animals (e.g. snails), which also -- with the exception of hermit crabs -- are fused to their shells and cannot "take them off". In fact, the whole idea of "shells being removable" likely stemmed from empty shells found on beaches, which may lead to people believing that their "owners" left them behind. It's also often confused with "shell molting".
9
10SubTrope of ArtisticLicenseBiology, AppropriateAnimalAttire, and FunnyAnimalAnatomy.
11
12Compare FurIsClothing and RemovableAnimalMarkings (the mammalian equivalents).
13
14Contrast EggshellClothing (the shell that is supposed to come off does not).
15
16----
17!!Examples
18
19[[foldercontrol]]
20
21[[folder:Advertising]]
22* For the longest time in the UsefulNotes/TwinCities area, there were commercials for a casino whose mascot was a shell-less turtle dancing in [[GoofyPrintUnderwear polka dot heart boxers]].
23* "Smutley the Cat: Gettin' Tail", an animated PSA produced by AIDES (a French organization with the goal of raising awareness of AIDS), has the titular anthropomorphic cat going around [[InterspeciesRomance boning various animals of different species]], the message at the end reading "[[CatsHaveNineLives He has nine lives]]. You only have one. Protect yourself." The first person Smutley has sex with is a turtle, who has her shell off when Smutley shags her.
24[[/folder]]
25
26[[folder:Anime and Manga]]
27* The obscure Japanese series ''Anime/OraaGuzuraDado'' had one turtle character, for whom this trope was a running gag.
28* ''Manga/DragonBall'''s Master Roshi, though not a turtle, is the turtle hermit, and wears a heavy shell on his back for [[TrainingFromHell training purposes]] which is fully detachable.
29* In ''Anime/PaniPoniDash'', the cast travels inside [[CloudCuckoolander Himeko]]'s dreams, wherein the Archangel Michael has a turtle companion who keeps losing her shell.
30[[/folder]]
31
32[[folder:Comic Books]]
33* The Terrific Whatzit, a Creator/DCComics [[UsefulNotes/TheGoldenAgeOfComicBooks Golden Age]] FunnyAnimal superhero, is a turtle who possessed a costume similar to that of the Golden Age [[ComicBook/TheFlash Flash]], and powers similar to those of Golden Age speedster Johnny Quick. When in costume, he removed his shell (his superhero name stemmed from the difficulty of telling what species he was without the shell).
34* Brazilian comic [[Comicbook/MonicasGang Lionel's Kingdom]] has among its characters a turtle whose shell is not only this, but [[https://i.pinimg.com/originals/fe/bf/14/febf14e2db94e532f0c546cdfc0194b4.jpg "customized" so his head comes from the middle of it.]] One story had him forced to send it to repairs and borrowing some shellscarapaces while he waited: armadillo (curled into a ball, making the turtle become an unwilling child plaything), crab (only walked sideways), snail (too slow), and cockroach (aerodynamic, but given it's a very unpopular bug, made him get crushed).
35[[/folder]]
36
37[[folder:Films -- Animation]]
38* Verne in ''WesternAnimation/OverTheHedge'' often loses his shell. After this happens several times, R.J. asks Verne, "What is the point of this thing again?"
39* In ''WesternAnimation/CatsDontDance'', T.W. Turtle ducks into his shell on one occasion and re-emerges with a scrub brush and soap, as though he'd been cleaning the inside. Then, after the flooding of Mammoth Studios, he can be seen out of his shell, standing on it as it floats in the water and even rows it like a boat.
40* A chipmunk falls inside a turtle's shell in ''WesternAnimation/SnowWhiteAndTheSevenDwarfs''.
41* One scene in ''WesternAnimation/RobinHood1973'' had Toby Tortoise pull his head into his shell and peek out from one of his armholes.
42* A JustifiedTrope in ''WesternAnimation/ChickenhareAndTheHamsterOfDarkness'': Abe is a turtle who reveals late in the film that [[spoiler: he was born without a shell, and the one he wears isn't part of his body]].
43[[/folder]]
44
45[[folder:Literature]]
46* Clothahump the turtle wizard in Creator/AlanDeanFoster's ''Literature/{{Spellsinger}}'' series doesn't have a removable shell, but he has enchanted his plastron to install transdimensional cabinet drawers in his chest.
47* ''Opposites'' by Creator/SandraBoynton is a board book that had the purpose of teaching the reader about opposites. In and out are represented by a turtle getting out of its shell and standing on it to get closer to a turtle that is still in its shell.
48* ''The Foolish Turtle'' is a picture book by Eric Carle about a turtle who took off his shell, only to then realize that he's much more vulnerable without it. After narrowly avoiding various hazards, the book ends with the turtle returning to his shell and going to sleep.
49* According to one of Aesop's fables, "Jupiter and the Tortoise," the tortoise's shell used to be his home, which he could leave at will. When he didn't show up to a party thrown by Jupiter, king of the gods, Jupiter came to his house and asked him why. When he said that he would much rather stay home, a furious Jupiter declared that he would forever be condemned to carry his home upon his back, and so that is why tortoises can never leave their shells.
50* The French children's book "Mali et la tourte toute nue" ("Mali and the Naked Turtle") was about a young girl helping a turtle find her lost shell.
51[[/folder]]
52
53[[folder:Live-Action TV]]
54* ''Series/MysteryScienceTheater3000'': During one of the ''Film/{{Gamera}}'' movies, the bots decided to make a model of Gamera to show what's inside his shell. As they imagined it, he has a fully furnished apartment, complete with a gym, inside there. As well as another door which should never be opened, because that's where Gamera keeps all his internal organs.
55* Subverted in ''Series/RedDwarf'': Lister recounted how, when he was a kid, he once opened a turtle's shell with a can opener. Said he, in his defence: "Well, I didn't ''know''!"
56* Subverted in a NoodleIncident mentioned by Darnell on ''Series/MyNameIsEarl''. [[TheDitz Randy]] apparently pulled the original Mr. Turtle out of his shell to see what was inside, then crammed him back into it hoping Darnell wouldn't notice. The original Mr. Turtle didn't survive.
57[[/folder]]
58
59[[folder:Manhua]]
60* One ''Manhua/OldMasterQ'' strip have the titular character coming across a man-sized tortoise shell with the words "Room for Rent" written on it's back. As Master Q curiously tries taking a closer look, a voice behind him asks, "Would you like a room?" Cue Master Q turning around and seeing a naked, human-sized [[TalkingAnimal talking tortoise]].
61[[/folder]]
62
63[[folder:Newspaper Comics]]
64* Back in the Eighties, there was a newspaper cartoon (''Some Thoughts'' by Eric Johnson) in the UGA college newspaper, ''The Red and Black'', that featured a series of strips about a turtle jumping out of his carapace (wearing the requisite wife-beater and boxers), later snuggling inside the carapace with a turtle-honey, and finally, about some Georgia Tech students who indignantly wrote in to the cartoonist to complain that [[ComicallyMissingThePoint they had opened up a real turtle and not found a little animal in boxer shorts]].
65* ''ComicStrip/{{Garfield}}'':
66** The March 15, 2005 strip had Garfield ask a snail if they ever leave their shells. The snail answers that they only leave their shells for fire drills or skinny dipping.
67** In the January 31, 2017 strip, Garfield challenges a snail to a race and the snail manages to outrun Garfield by leaving his shell behind.
68-->'''Garfield''': Hey! That's cheating!
69[[/folder]]
70
71[[folder:Puppet Shows]]
72* One episode of ''Series/TheMuppetShow'' features a turtle who doesn't leave his shell, but is able to stick his head out a hatch at the top like a tank, while a gun emerges from the head hole.
73[[/folder]]
74
75[[folder:Tabletop Games]]
76* ''TabletopGame/DungeonsAndDragons'' has the Tojanida; a monster that resembles a cross between a sea turtle and a lobster. It has eight holes in its shell, out of which it can freely stick its flippers, claws, and head in any configuration it desires.
77[[/folder]]
78
79[[folder:Video Games]]
80* Dub from ''VideoGame/DieAnstalt'': Treating his neuroses required you to literally get him out of his shell.
81* Turtles and other shelled creatures all across the ''Franchise/SuperMarioBros'' have removable shells.
82** When flipped over from underneath in ''VideoGame/MarioBros'', the Shellcreeper, clad in white, exits its shell to flip it back before re-entering and continuing on its way. Later replaced with non-deshellable Spinies in many later versions and reboots of the game, though Shellcreepers reappear in ''VideoGame/SuperSmashBrosBrawl'''s level based on the arcade classic.
83** Prototype artwork from ''VideoGame/SuperMarioBros1'' shows a design for a Koopa-like turtle without a shell that wears boxers and holds a weapon of sorts. It was probably scrapped due to programming limitations.
84** Stomping on the newly-upright Koopas in ''VideoGame/SuperMarioWorld'' launches them skidding out the front of it, wearing just a white undershirt [[FullFrontalAssault and nothing else]]. Hunched as they are, fortunately the sight is kept clean thanks to [[BarbieDollAnatomy SNES pixelation]]. Taken to extremes in the ''VideoGame/SuperMarioWorld'' hack ''SMW YEAHHH', with the blue Elite Koopas. They actually take off and fire their shells at Mario like missiles, even while flying. [[https://www.youtube.com/watch?v=joZ-1Vm9kkQ Seen here.]]
85** Averted in the Gameboy title ''VideoGame/SuperMarioLand'', where it was apparently too graphics-intensive. The equivalent monster has an exploding, non-removable shell, and plays more like a Bob-omb expy. Quite a bombshell, huh?
86** A whole sequence is based around this in ''VideoGame/PaperMario''; the Fuzzies invade Koopa Village and steal everyone's shells, leaving Mario to recover them.
87** Full-sized Koopas can be punched or stomped out of their shells in ''VideoGame/SuperMario64'' and ''Super Mario 64 DS'', where they act especially timid around the heroes even with a shell on. You can then jump on the shell and surf around at high speeds until you bump into something, and the shell-less Koopa will desperately try diving back into the shell, [[SuicideMission no matter the cost]]. Needless to say, they're even more skittish when [[FullyClothedNudity just in their white undershirt and blue boxers]].
88** Similarly, Koopas in ''VideoGame/SuperPrincessPeach'', ''VideoGame/YoshisIslandDS'' and a few other 2D ''Mario'' sidescrollers are ejected from their shells when stomped. They remain pretty relaxed when this happens, continuing on just the same even though they're [[ShirtlessScene shirtless]] and in [[ColorCodedForYourConvenience their boxers]].
89** In ''VideoGame/SuperMario3DWorld'', the player can actually briefly [[SuperSpeed slide around inside the shells]] by crouching when carrying one from a deshelled Koopa. Weirdly, they [[FullFrontalAssault ditch the boxers]] for this game after having consistently worn them in the past.
90** When it's still early enough in the game that you won't [[OneHitKill auto-defeat]] them in ''VideoGame/MarioAndLuigiPaperJam'', during combat Koopas will occasionally, on their attack, charge in their shells and launch really fast at Mario/Luigi; hammering them at just the right time will stop the shell and eject them for a moment, dazed and vulnerable, so you can hammer the shell back at their heads and kill them automatically. Again, a case of Koopas wearing [[FullFrontalAssault just a shirt]] underneath.
91** Stone Buzzy Beetles in ''VideoGame/SuperPaperMario'' ''apparently'' have super tough shells, though unlike the regular variation these critters' shells can literally get cracked clean off in three stomps. The game's glossary and Tippi both note that you might feel a little guilty breaking it off and [[BodyHorror killing them as a result]], yet [[GivingUpOnLogic it doesn't indicate ''why'' this kills them]] - after all, for a brief second you can see them in their underwear as though it ''should'' be removable, but oh well.
92** ''VideoGame/SuperMarioBrosWonder'' has its Koopas no longer have detachable shells, but it introduces a new snail-like enemy that follows the same mechanic. Stomping it will eject the mollusc from its shell, which gets stunned but is no worse for wear after.
93** The only instance of an important or prominent recurring Koopa getting de-shelled is in home PC ports of ''VideoGame/MarioIsMissing'', where [[BigBad Bowser]] gets this treatment in the game's ending. Worth noting that this game also portrayed Bowser's tail as [[OffModel being part of his shell]], and that, in a prime example of GivingUpOnLogic, Luigi pulled Bowser's carapace off and the latter then appeared in his GoofyPrintUnderwear, ignoring the plastron as if it's part of him.
94* In ''VideoGame/AmericanMcGeesAlice'', Mock Turtle's shell gets stolen by the Duchess, and Alice gets to become a honorary reptile by helping recover it.
95* Carapacion-type enemies in ''VideoGame/FinalFantasyXIII'' might qualify, as when "Broken" their carapace vanishes, which removes their Nigh Invulnerability until they restore the carapace.
96** It's only really iffy because even when they actually have the carapace it's not a true shell, but more closely resembles a pangolin or man-made scale/plate armor.
97* The Subspace Emissary in ''VideoGame/SuperSmashBrosBrawl'' has a enemy called the Shellpod, which has the appearance of a deep brown stag beetle with green legs and glowing eyes. Dealing significant damage to the heavily-armed beetle-turtle breaks the shell clean off, causing the ridiculous-looking all-green creature to shriek and takes damage WAY quicker until it is defeated.
98* At the end of the third temple in ''VideoGame/TheLegendOfZeldaPhantomHourglass'', Link is pitted against Crayk, essentially an enormous hermit crab. The first phase of the battle involves shooting the [[{{Invisibility}} invisible]] opponent in the eye using the convenient [[JawsFirstPersonPerspective camera references]], and then slashing at the purple orbs supposedly keeping Crayk's shell in place. Once they're all destroyed, Crayk freaks out and the shell explodes, leaving it pretty [[ArmoredButFrail easy to take down using a few more arrows]] - not to mention how [[AttackItsWeakPoint obvious the game makes Crayk's tail out to be]]. During the same fight, Link is also able to swing his sword around at the little Crayklings in order to restore health, which in taking two hits each, breaks the little crabs' shells in the process.
99* The Polish puzzle game ''Zagadki Lwa Leona'' features a puzzle where you have to help a turtle whose shell apparently was stolen and inexplicably got stranded on a branch.
100* ''Franchise/{{Pokemon}}'': According to its Pokedex entry, Shelmet is a snail-like Pokemon whose helmet-like shell is often removed from its body by a beetle-like Pokemon called Karrablast so it can evolve into Escavalier (which resembles an armored insect who has spears for arms and said armor being made from said shell). Fortunately, Shelmet evolves into Accelgor, a ''{{ninja}}'' slug with [[SpeedySnail a whopping 145 base Speed]].
101* One of the playable characters in ''Battle Beast'' is a turtle who can step out of his shell, which then gains a handle as it turns into a [[CarryABigStick large hammer to pummel his opponents with]].
102* ''VideoGame/MegaManX''
103** Armored Armadillo of the first game can has his armadillo shell be broken with Electric Spark, making him more vulnerable to attacks.
104** The second game has Crystal Snail. If you hit him with the Magnet Mine, his shell flies off, causing him to lose his only method of defence and causing him to focus on trying to reclaim it over attacking you...which you can prolong indefinitely by knocking the shell around. Justified because he's a robot.
105** The sixth game's Shield Sheldon is a clam robot who freely throws his clam shells around like Captain America with his shield.
106** The eighth game's Earthrock Trilobyte will have his shell broken with any weapon acquired from Gravity Antonion.
107* In ''VideoGame/{{Aquaria}}'', Naija can remove the shells of small turtles with her Bind song, which would otherwise damage her.
108* The Escarglow Dream Eaters in ''VideoGame/KingdomHearts3DDreamDropDistance'' [[PrecisionGuidedBoomerang throw their shells like boomerangs]] for a number of their attacks. They have a serious flaw in that their shells will be smacked away if they receive a solid hit, which causes them to prioritize getting them back over anything else and being snails, they do this ''slowly''.
109* [[HeavilyArmoredMook Turtles]] in ''[[VideoGame/DarkwingDuckCapcom Darkwing Duck]]'' for NES ''sneeze'' their shells at Darkwing, at which point they are vulnerable (but, interestingly, still really tough, requiring 6 pellets to go down). The shell then comes back like a boomerang, so watch your back while attacking them.
110* In ''VideoGame/ShowByRock'', Turtle BIG ([[ADogNamedDog a turtle]]) and Takeppa (a kappa) have shells that are represented as backpacks worn ''outside their clothing'', implying they can put them on and take them off at their leisure like any other fashion accessory.
111[[/folder]]
112
113[[folder:Webcomics]]
114* All Terrekin in ''Webcomic/CosmicDash'' have a shell that attaches to their back, [[http://www.cosmicdash.com/comic/episode-3-pg-3/ through a hole in their clothes]]. WordOfGod mentions genetic engineering.
115* In ''Webcomic/ElGoonishShive'', the implementation of shells as armor in video games is {{discussed}} with [[https://www.egscomics.com/egsnp/teddgameopinions-026 the visual]] of Nanase wearing a shell and apparently nothing else implying that it's replaced all her clothing.
116* ''Webcomic/KevinAndKell'':
117** Todd is a toad who one day happened upon the empty shell of a recently-predated turtle. He heard a snake approach, and jumped into the shell. As it turned out, that snake, Greta Garter,[[note]]later a student at Beige University, who would be roommates with one of the main characters, Fiona Fennec[[/note]] was set up on a blind date with the turtle that was eaten. Todd rolled with it, pretending to be the turtle, and ultimately became Greta's boyfriend. A few years later, he would reveal himself after moving unnaturally fast (for a turtle) to save Greta from a falling vent grate. They would remain together, and Todd eventually stopped wearing the shell so another character, Ophelia Stoat, could use it as a disguise.
118** Speaking of Ophelia, since getting the shell, she eventually evaded her pelt hunter pursuers, and was declared dead (taken). Lindesfarne Dewclaw created a new identity for her that set her species as a turtle, an identity she takes seriously.
119** The February 7, 2005 strip had Kell meet a turtle woman without a shell. She explained that her son was in a warzone, and she figured he needed more than one.
120** In the January 29, 2011 strip, a turtle is forced to remove his shell to use Facebook and complains about the violation of privacy.
121* Simonla of ''Webcomic/{{Sonichu}}'' assures the other Rosechus, and the audience, that her shell is removable so nothing will get in the way of her breasts when she poses nude.
122[[/folder]]
123
124[[folder:Western Animation]]
125* ''WesternAnimation/LooneyTunes'':
126** Cecil Turtle is regularly depicted with a removable shell. In one of his races with Bugs, it's shown to be equipped with a jet propulsion engine.
127** ''WesternAnimation/BabyBottleneck'' shows a baby turtle being removed from his shell in order to be diapered and later opening up his shell to complain about nearly drowning in milk when the babies are being fed prior to [[DeliveryStork delivery]].
128** ''WesternAnimation/GreetingsBait'' has a crab chasing a worm around underwater. The worm goads the crab into removing its protective carapace so that the fight will be more even (and revealing the crab's true body to be much smaller than its shell), but the worm still gets the crap beaten out of him regardless.
129* Happens nearly ten years before Cecil's debut in 1941 to a turtle in 1932's ''[[https://www.youtube.com/watch?v=TFHZb5dhnWE Freddie the Freshman]]''.
130* Filbert the turtle in ''WesternAnimation/RockosModernLife'' sometimes has his shell depicted as removable.
131* Gary the snail in ''WesternAnimation/SpongeBobSquarePants'', depending on the episode. Sometimes the shell lifts up to show something hidden inside; sometimes the shell is BiggerOnTheInside and [=SpongeBob=] is able to crawl into it; and sometimes cracking the shell [[SubvertedTrope exposes Gary's veiny, throbbing innards.]]
132** Mr. Krabs' shell is also sometimes treated as removable. Its loss tends to result in NakedPeopleAreFunny (although he already wears a full outfit ''on'' his shell at the same time, so he can also be portrayed as naked by removing the clothing, but not the shell). Under it is a pink, fleshy body, similarly to real crabs when they molt their shells.
133** The one-shot character Tony from “Shell Games” also has a removable shell which he lives in, as do 2 other sea turtles in the same episode.
134* WesternAnimation/{{Franklin}} and all of his family members have shells that are removable. Played with in a fire safety story in which Mr. Turtle found that he could not evacuate his house by the window unless he first removed his shell.[[note]] Interestingly enough, in the very first ''Literature/{{Franklin}}'' book of the book series that the cartoon was based on, 'Franklin in The Dark', the story centres around Franklin overcoming his fear of entering his turtle shell because of his fear of small, dark places.[[/note]] In the ''Franklin and Friends'' AllCGICartoon spin-off, however, Franklin and his family's shells are integral parts of their bodies that they can't remove, [[AvertedTrope averting]] this trope.
135* Shelby Turtle from ''Mickey [=MouseWorks=]'' and ''WesternAnimation/HouseOfMouse'' (which recycled many shorts from the former) was depicted as having a removable shell and wearing a diaper underneath.
136* Br'r Turtle from Br'r Hare fame.
137* Happens in the ''very'' first episode of ''WesternAnimation/DinkTheLittleDinosaur''. Crusty takes off his shell to take a bath. When the [[DesignatedVillain resident badguy]], [[TRexpy Trannor]] shows up, one of the characters hides in the shell and he carries both the shell and the character off.
138* Sheldon the turtle in ''WesternAnimation/FamilyGuy''. Stewie says that his skinny body looks like "a nude Creator/LarryDavid".
139* In ''WesternAnimation/MikeLuAndOg'', one of the misfortunes that Lu's pet turtle Lancelot frequently suffered was losing his shell.
140* ''[[Franchise/WinnieThePooh My Friends Tigger & Pooh]]'':
141** Turtle has this and when he and Rabbit re-create the historic race between their grandparents, ala ''Literature/TheTortoiseAndTheHare'', he removes it and gains a great boost in speed, becoming about the same speed as Rabbit. In the end, after they both end up calling the Super Sleuths to help the other, they end the race in a tie... just as their grandparents did.
142** An entire installment, "Turtle Comes Out of His Shell" is about Turtle taking his shell off, saying he doesn't want to wear it anymore because it slows him down. However, he soon discovers that he can't do things he used to enjoy doing like slide on his back and he also gets cold in the snow, though he didn't before.
143* ''WesternAnimation/BigBlue'': Freddie, a sea turtle, is shown to be able to remove his shell. He's sometimes seen doing this to polish it, but one episode even has him lend his shell to Phil (a dolphin) to help him get over his fear of getting injured.
144* The ''WesternAnimation/FlipTheFrog'' short "Flying Fists" had Flip engage in a boxing match with a turtle. The short concludes with the two colliding into each other, resulting in Flip standing victorious while wearing his opponent's shell and the turtle running off in shame because he's left in a union suit.
145[[/folder]]
146
147[[folder:Real Life]]
148* The hermit crab. It's quite an oddball in that it's the only arthropod that uses a calcified shell for protection. Except, it doesn't produce its own, it simply looks for an abandoned gastropod shell. As it grows, it needs to look for bigger and bigger shells to accommodate. Quite hilariously, they also use manmade rubbish -- like plastic bottlecaps, for instance. This is not a great thing for them, given that their bodies are adapted for using old gastropod shells and not plastic bottlecaps or old soda cans -- using human garbage can injure them or leave them vulnerable to predators.
149* The turtle's shell is the last part of the reptile's body to deteriorate.
150* Sadly, this trope is responsible for an awful lot of badly-injured turtles turning up at vet clinics and wildlife rehab centers, after ignorant people's attempts to "take off" their shells to see what they look like without them. Answer: They look ''dead'' without them. (To clarify: there is no skin under the shell, only muscles, viscera, bones, fat and blood. Same in snails, minus the bones and [[AlienBlood blood being different]])
151* ''Myobatrachus gouldii'', aka "the tortoise frog" is an Australian frog which looks exactly like what you'd ''expect'' a shell-less turtle to look like without knowledge of the above, hence its nickname.
152* The female argonaut octopus secretes a shell-like calcareous eggcase, separate from their body, in which to reside.
153* Shipworms, members of the clam family, have reduced their shells to a pair of opposing rasps with which to burrow into ocean-immersed wood. In effect, they're bivalves that have 'undressed' from their shells.
154* The only animals that can actually pull this off in real life the same way it occurs in fiction are some types of polychaete tube worm, which can abandon their chitinous or mineralized tubes if their habitat becomes unlivable. They have to re-grow a new one when they settle down again, however.
155[[/folder]]
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