Well, It looks as though our heroes have been Swallowed Whole and must find a way to escape. The predator in question may be a whale, a dinosaur, a dragon, an Eldritch Abomination, or... wait, why is the creature hollowed out?
This is a subtrope of Artistic License Biology, when the interior of the predator looks like the inside of the ribcage, devoid of any internal organs. Sometimes even WITH organs, as if the esophagus led to the creature's body cavity and not the stomach itself. In videogames, this can be seen in the Womb Level. This trope can be averted by a depiction of the inside of the stomach as the inside of a meaty balloon, with acid dripping down the walls for good measure. When not, as long as it belongs to some fantastical and/or supernatural creature it can hide behind the legit argument of Bizarre Alien Biology.
- Fullmetal Alchemist has an interesting variation: After Lust dies, Gluttony goes on a rampage. He gets a ribcage mouth.
- In Disney's Pinocchio, the inside of Monstro is depicted like this.
- In a brief post-credit gag in Shrek, Lord Farquaad is singing "Stayin' Alive" in the Dragon's stomach which looks like this.
- In Finding Nemo, after getting lost in the Pacific Ocean, Marlin and Dory get swallowed by a Blue Whale. Interestingly, the trope is slightly inverted in that they are trapped inside the enormous mouth instead of the stomach but since the whale is so massive Marlin treats it as such and the baleen is practically solid bone. Fortunately for Marlin and Dory, the whale is carrying them to Sidney to help Marlin on his quest.
- The swamp monster in Dinosaurs that eats Robbie and Earl in one episode.
- In "The Mariner's Revenge Song" by The Decemberists, the protagonist has just been swallowed by a whale, and the song contains the line "Its ribs are ceiling beams", implying this trope.
- Paintings of Jonah and the whale usually play this trope straight.
- Another Game Boy game, Balloon Kid, also has a stage set inside a whale.
- Fossil Fighters: When Swallowed Whole by the Bonehemoth, the players navigate the inside of the whale, complete with visible ribs.
- In Klonoa Advance 2: Dream Champ Tournament, there is a level that appears to take place inside a whale, complete with this.
- In Rogue Legacy 2, the fight against Estuary Tubal takes place inside the body of a large dragon named Ladon. How Ladon could be slowly poisoned by Estuary Tubal, when he has no innards is an exercise for the reader.
- Featured as an egg hiding place in Spyro: Year of the Dragon. What seems to be the tongue leads directly to the ribcage.
- The Star Fox Adventures boss Galdon, how he manages to puke Fox out twice with that roomy and rigid a stomach is anyone's guess.
- Cracked's #8 Real Old-Timey Photographs That Will Give You Nightmares is of an amusement park's souvenir shop themed this way.
- In Homestar Runner:
What manner of uncivilised rib-cage is this anyways?
- This trope is played straight in the Teen Girl Squad Decemberween special. It is later averted in the Stinkoman Thanksgiving special.
- Played straight again in the toon Sickly Sam's Big Outing Sickly Sam eats Strong Bad (very slowly), and Strong Bad ends up in one of these with a barrel and a game of Parcheesi.
- Camp Lazlo takes this trope even further by incorporating a ribcage and a uvula into a giant bird's stomach. The latter has some plot relevance.
- A few Eat the Camera moments in CatDog show the titular hybrid's stomach like this.
- Dragon Tales did this with a dragonoceros.
- The Goldie & Bear episode, "Whale of a Tale", has a moment where Goldie, Bear and Big Bad are Swallowed Whole by a giant fish with a ribcage interior.
- The shark in the House of Mouse short "Mickey and the Seagull".
- Season 5 of Ninjago reveals that the Cursed Realm introduced in Season 4 is a living creature called the Preeminent, and the inside of it, or at least what is shown, has a ribcage structure◊. Justified since it's more of an Eldritch Abomination than a realistic creature.
- In the "Game of Peril" episode of The Perils of Penelope Pitstop, this trope is in play when the Ant Hill Mob are swallowed by a whale.
- Happens in the Phineas and Ferb episode "Perry Lays an Egg", when Doofenshmirtz's ex, who dumped him for a whale, is shown living inside of it.
- In an episode of Xiaolin Showdown, Dojo is accidentally let out of his cage during the periodic hour when he becomes evil, and then he swallows the four Xiaolin Monks whole. They eventually escape, and Dojo got better.
- The Grim Adventures of Billy & Mandy episode "Billy Ocean", in which Billy is swallowed by a whale in the vein of Pinocchio. He even meets the same Pinocchio he met in the fairy tale episode, who, again, is trying to consume his flesh so he can become a real boy.