"Look, daddy, a whale egg!"In the natural world, living creatures have a myriad of ways of bringing more young into the world. Some produce thousands of eggs and young that grow quickly but only a few make it to adulthood. Others invest huge amounts of time and resources to develop and take care of only a few at a time. In fiction, it's often simplified into laying eggs, even if the biology of the creature in question should indicate otherwise. This is very useful in bypassing the complications of an Interspecies Romance and the Squick of a live birth, which is also why it's a common implementation of G-Rated Sex. Popular Mons trope, as pretty much every Mons series uses it. Especially the ones that originate in Video Games, where it also serves to simplify the breeding mechanics — see Hot Skitty-on-Wailord Action. Whales don't lay eggs; they're mammals that give live birth.
— Ralph Wiggum, The Simpsons
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Anime And Manga
- Digimon Adventure, the Digimon are asexual so the eggs actually spawn from the remains of dead Digimon. Since the Digimon that "spawn" from this act are actually the same individual Digimon that died, it works as a Disney Death. Though several cases could result in real death for good, such as fights taking place in the real world, or if someone manages to invent a device to get rid of that feature. The first season is the only one to address this specifically, with others either leaving it ambiguous or not addressing it at all.
- The fifth chapter of Eastern and Little Nature Deity revolves around a giant mysterious egg. Most characters assume it's from a cat youkai.
- Fairy Tail: Happy hatched from an egg. Supposedly, so did his Romantic Interest Carla. Their species, for reference, resemble bipedal cats. Their eggs are also larger than full grown members of the species, in case the fact that they technically aren't cats made eggs seem plausible.
- Tenchi Muyo! had Ryo-Ohki, a cat/rabbit creature who can turn into a spaceship and a humanish girl, hatch from an egg. In addition, Ryoko joked that the egg was hers and that Tenchi was the father, but it later turns out that, in a really convoluted way, the egg came from Washu.
- Although Domo appears to be mammalian in nature, his first appearance was being hatched from an egg.
- Namekians are asexual aliens that reproduce by spitting eggs infused with some of their life force.
- Skrulls lay eggs. Johnny Storm, who was briefly married to a Skrull named Lyja (long story), was greatly disconcerted when she... well, laid an egg. It turns out it wasn't his, though. Which was... good news and bad news at the same time, kinda.
- This was subverted in an Archie Comics story, where Jughead had to take care of what he thought was a kangaroo egg in Professor Flutesnoot's laboratory, until Mr. Weatherbee showed up and informed Jughead that kangaroos don't lay eggs. When the egg did hatch in the end, it turned out to actually be an ostrich egg.
- The Easter Bunny, according to some. They're not all chocolate, you know. Mythologically, the bunny originated as an egg-laying animal; being able to lay eggs once a year was a form of consolation (the day was only later retconned to Easter). Of course, in the original myths the bunny wasn't Peter Cottontail.
- In Greek mythology, Leda, the human queen of Sparta, has sex with Zeus in the form of a swan, and later with her human husband Tyndareus. She lays two eggs, one containing Castor (usually the son of Tyndareus) and Polydeuces (son of Zeus), the other containing Helen (usually daughter of Zeus), later of Troy, and Clytemnestra (daughter of Tyndareus). The parentage and pairing of these children is not consistent, but the story always involves two completely normal human children hatching from eggs.
- In Korean Mythology, many founding heroes of ancient kingdoms (three kingdoms) were born from an egg. Here are examples:
- Go-Jumong (King Dongmyeong), founder of Goguryeo Kingdom, was born as a large egg that his mother (Lady Yuwha) laid. His stepfather (King Geumwha) took this as bad omen and tried to get rid of it, but all attempts failed (when it was thrown into wilderness, fierce animals and birds kept it warm; and even the strongest warrior couldn't break its shell open). Finally Jumong was born, and he soon grew up to be a master archer and charismatic hero (which is not surprising, given that his father is the ''Sun god Haemosu'').
- Theres also Pakhyeokkeose, Seoktalhae and Kimalji, three founders of Silla Kingdom. Plus there's King Kim Suro, founder of Gaya (a minor kingdom that was later absorbed into Silla).
- Sun Wukong technically hatched from a rock, but it's often referred to as the Great Stone Egg. More literal to the trope, Pan-Ku, the first living being, hatched from an egg that became the sky and the ground.
- In Hawaiian Mythology, the Earth goddess Papa laid an egg on an island or archipelago known as "Kahiki". It contained the goddess Hi'iaka, who was carried to Hawaii in the egg by her older sister, Pele, and Born as an Adult.
- The humanoid Red Martians in Edgar Rice Burroughs John Carter of Mars novels lay eggs that are then hatched in incubators. They are somehow cross-fertile with humans.
- Happens as a (disturbing) twist at the end of the Goosebumps book ''Egg Monsters From Mars".
- Subverted in Tamora Pierce's short story Nawat. The titular character's wife does not lay eggs, despite her fears. Instead, one of the babies takes after her crow-to-human shapeshifter father by eventually growing some feathers.
- At least two of the races (namely, the chiropteran Aeries and the near-human Walkers) in Laurie J. Marks's Children of Triad trilogy seem to be monotremes.
- Played with in Dr. Seuss' Horton Hatches The Egg: Everybody flocks to see the (male) elephant sitting on an egg, but it was actually laid by a bird who asked Horton to egg-sit (though it's unclear if the mother planned to come back). At the end, this trope turns out to be a case of Lamarck Was Right, as the egg hatches into a winged elephant.
- The Last Dragon Chronicles: Descendants of Guinivere hatch from eggs. It Makes Sense in Context.
Live Action Television
- The atom bomb that appears in the lads' house on The Young Ones turned out to be an airplane egg, which hatched a tiny balsa-and-rubber-band toy plane at the end of the episode.
- When kobold Pumuckl and his "owner" (for the lack of a better word) were in the zoo, Pumuckl found an ostrich's egg and thought it was an elephant's egg.
- Mork & Mindy: Mr. Seahorse himself, Mork from Ork. It's a huge egg.
- Dungeons & Dragons:
- A sylph is an Always Female fey who looks like a beautiful elf woman with dragonfly wings. To bear a daughter, she has to seek a mortal suitor, usually elf, human, or Halfling. Despite this, the child, described as a "baby girl with wing buds", hatches from an egg that the sylph keeps in a special nest, guarded by an air elemental.
- The game also gives this trait to pretty much any beast that has bird-like wings, no matter how much it resembles a mammal otherwise. Griffons, hippogriffs, and pegasi all hatch from eggs. (It's mentioned in the description for avorials, or winged elves, that there's an in-universe belief that this is true for them, but it is not.)
- Bomberman: Blowing up a soft block in later games will sometimes yield a giant egg. Touch this egg, and an adorable kangaroo hatches. (Averted in Saturn Bomberman, because they're dinosaur eggs instead.)
- Billy Hatcher and the Giant Egg has them all over the place, generally used as weapons and movement aids. Things that can hatch from these eggs include tigers, butterflies, winged fire-breathing hippos, and Sonic the Hedgehog himself, among who knows what else. It's even lampshaded when an NPC chick wonders who or what laid all of these eggs to begin with.
- Spore: Every creature hatches from an egg, be it lizard-bug, or snake-monkey, or what have you.
- Final Fantasy Tactics: Every monster that joins you reproduces asexually by laying eggs. Makes sense for the Chocobos, gets strange for the cats, skeletons, trees, and pigs.
- Lightning Returns: Final Fantasy XIII: Fuzzy Sheep are discovered to lay eggs. An NPC who is a biologist reminds us about the platypus.
- Creatures: The Norns and Ettins look mammalian (and one popular third-party breed for the second game was able to nurse their young,) but all three creature types lay eggs (of course, they were all genetically engineered by an entire species of extremely absent-minded scientists, so they don't necessarily have to make that much natural sense). The scientists were also so squeamish (canonically!) as to have to invent kisspopping, so whatever process results in the eggs, they likely found it more emotionally palatable than seeing a miniature version of the Norns (et. al.) being shoved out of an orifice of another.
- In earlier Dragon Quest Monsters games, your monsters laid eggs, regardless of what they were.
- Every single Pokémon ever. Including the whales. And the plants. And the rocks. And the ghosts. And the eggs. And the god too. Apparently, the first thing to ever exist was the egg of Arceus! And the age-old question is put to rest.
- There is one exception. A diary entry in the Cinnabar laboratory states that "Mew gave birth." Mew is also among a subset of Pokémon that are functionally genderless and never lay eggs. On the other hand, the birth may or may not have happened, as every piece of information on Mewtwo's origins are contradicted somewhere else. It could have been just a metaphor, since it is said that Mew's genes were used in the creation of Mewtwo.
- The Facebook game Fish World lets you gain new creatures for your virtual aquarium by buying "Fish Eggs". The, err, "Fish" include everything from crabs to turtles to squid to, yes, Whale Eggs.
- Collecting chicken-style eggs that will hatch out into all sorts of creatures — birds, mammals, frogs, fish, bugs, trees, VAMPIRES — is the whole point of the Facebook game Hatchlings.
- The plot of The Legend of Zelda: Link's Awakening is to break the ostentatious egg of the Wind Fish, which is essentially a gigantic, telepathic whale with disproportionate wings! (Also to fight evil Kirby clones, but that's irrelevant at the moment.)
- Super Mario Bros.:
- Ever wonder how Bowser got his kids in the first place? Now we know why, considering if Bowser Jr's theory of how he was born was true...
- Super Mario Galaxy has Dino Piranha, a plant-dinosaur hybrid that is born from an egg, and Super Mario Galaxy 2 has Peewee Piranha, another plant-dinosaur hybrid born from an egg.
- In Minecraft, in creative mode, any and all of the mobs can be spawned with eggs, even pigmen and ghasts and villagers.
- Played with in the Adventure Island series, where you can get items from eggs, as well as dinosaurs (predictably). Who, or what, lays item eggs? Oviparous mammals, oviparous robots, and oviparous slime creatures in Pokémon figure into Cracked's #27 Science Lesson As Taught by Famous Video Games.
- There is an entire genre of games for tablets and mobile devices where the player builds some type of haven, fills it with decorations and/or enclosures, then breeds and/or feeds various monsters and critters. These frequently show the monsters hatching from eggs, even when the monsters look mammalian, such as in My Singing Monsters.
- In the Guilty Gear series, newborn Gears apparently hatch from eggs. This explains how Justice's daughter Dizzy was born years after her mother's demise.
- Putty has a Mutant Chinese Chicken which lays sumo wrestler eggs.
- Legend of Mana lets the player raise and train their own pets, all of which hatch from eggs, even sentient wooden toys and mimic chests.
- In MapleStory, one quest has you collect eggs from Chronos, Tick-Tocks, and Timers, and a related quest has you raise a baby Timer from an egg. While the last one resembles a bird, it and Tick-Tocks are Clockwork Creatures, and Chronos are undead beings; how any of them can even reproduce, much less from eggs, is a mystery. (Making it even weirder, the quest where you raise the baby Timer requires you to feed it Springy Toy Worms, and it's unlikely most living beings could eat such things.)
- The Facebook game Ovipets, where you breed horses, cats, and wolves, among other animals, all subsequently lay a egg. This is probably so it can have the game mechanic of turning other people's eggs to collect coins, and also give them a way to encourage you to keep coming back to the game; you have to turn the egg every so many hours by clicking on it for it to hatch, or have someone else do it.
- Homestar Runner: "A lifetime supply of fish sticks! And a The Cheat!"
- To elaborate: The Cheat was born out of a giant egg that was filled with fish sticks.
- According to his mother, Little One of Tales from My D&D Campaign hatched from an egg (he's half-dragon). Made even weirder by the fact that she also claims to have spent the entire pregnancy in her human form, which is why Little One manifests so few visible marks of draconic heritage.
- The Simpsons:
- In "Simpson Safari", a baby Rhinoceros is seen breaking out of its egg. Lisa points out that rhinos don't do that. Homer points out that they obviously do, since they just saw it happen.
- The scene the trope name comes from isn't an example as it's not an egg but an isolation chamber Ralph thinks is an egg.
- Gargoyles hatch from eggs roughly the size and shape of watermelons. According to creator Greg Weisman, the egg shells are malleable and leathery at first, but soon harden.
- In Family Guy, Peter mentions that he thought dogs came from eggs.
- In Justice League Unlimited, when referencing Shayera's pregnancy with his son Warhawk, Static tells Green Lantern, "Shayera was one cranky pregnant lady. Though to be fair, if I laid an egg that big..." Luckily, he was just kidding.
- Rocko's Modern Life gives an Interspecies Romance example, when Dr. Hutchinson, a cat married to a turtle, lays an egg. Even weirder, four kids come out of it, and since Heffer was the primary "egg-sitter," one of them is a cow already wearing glasses.
- Played with on American Dragon: Jake Long. Jake spends an entire episode protecting a griffin egg, finally returning it to its mother. It then hatches...and the mother eats the baby. While Jake is horrified, Fu Dog calmly explains that since griffins are half-bird and half-lion, the mother just needs to carry the baby the mammalian way for a bit. Oddly, we have to presume the dragons actually don't come from eggs, since Jake's dad still doesn't know what's going on. Then again, these dragons are human most of the time anyway.
- Inverted in Franklin and the Green Knight where they show Mrs. Turtle being pregnant rather than showing Harriet (Franklin's baby sister) hatching out of an egg.
- In the My Little Pony: Friendship Is Magic episode "Luna Eclipsed", Pinkie Pie is dressed up as a chicken for Nightmare Night. At one point she get so spooked she lays an egg. A dragon egg. Somehow.
- Inverted with Kif who is an alien who is basically humanoid, but has Bizarre Alien Biology that points to him being some sort of amphibian. When he gets pregnant, however, he winds up giving birth to a collection of tadpoles. It's an interspecies example, too, as the biological mother is Leela.
- Leela mentions that she occasionally lays an egg, more than likely, due to her mutant DNA.
- The Duck-Billed Platypus and Echidnas are the only living mammals to lay eggs. As an ancestral trait, egg-laying was probably much more common among mammals in the past, but by stroke of luck only a few lineages have survived to present day.
- Some animals you'd expect to lay eggs instead give birth to live young, such as certain species of sharks and snakes.
- Tsetse flies. They even raise their larva on a bug analogue of milk while they are developing.
- Beluga caviar sounds like this trope, but sadly, it's actually eggs from a fish called the Beluga Sturgeon.
- It could be argued that every species that doesn't reproduce asexually do come from fertilized eggs, with most mammals incubating in the mother's womb instead of in a shell. As the outer layer of a fertilized mammalian ovum becomes a placenta rather than a shell, whether this trope genuinely applies or not depends on how you look at it.
- Similarly, plant seeds could be considered a kind of egg. (Alton Brown invokes this trope on Good Eats when discussing what wheat germ is. He also compares an avocado to an egg, because of both its shape and its high fat content.)
- Here's some weirdness for ya. A good portion of mammalian DNA is non-sequencing, or "junk" DNA. That doesn't mean it doesn't do anything, though. For example, some of that is very important in allowing a fertilized egg to attach itself to the uterus. Some of that comes from Endogenous Retroviruses which basically means that an ancestor was infected with a virus that incorporated itself into their genetic code and passed it on to all future generations. Putting all that together has led scientists to theorize that it was a viral infection that allowed modern fetuses to bypass the mother's immune system and necessitate live births as opposed to eggs, splitting reptiles and mammals.
- While human fetuses don't have eggshells surrounding them, they do have an amniotic sac, which corresponds to the clear membrane just inside an egg's shell. Usually this splits apart and peels cleanly away from the infant before the latter emerges from the birth canal, but occasionally the sac (called a "caul") will still be completely or partially wrapped around the newborn after parturition. The caul is traditionally considered good luck.
- Occasionally, a chicken might have trouble laying an egg. Instead of going down the oviduct and out the cloaca like normal, it might remain there. Another yolk comes down for the eggshell to form and it might encase the previous egg as well, resulting in what looks like a larger then normal egg once the chicken finally lays it. This large egg will have the previous egg inside it. Other times, an egg will come out with a shell and white, but no yolk, and such eggs were once thought to be laid by roosters. Still other times, if a hen has some kind of distress or illness, she might lay a "cooked" egg or a mass of congealed pus. (No, really.) Most of the time, though, she will either lay sporadically or stop laying all together after that.