Flounder from The Little Mermaid is not actually a real flounder; he’s depicted as a bright yellow and blue tropical reef-style fish, most often thought to be inspired by an angelfish or similar colorful reef species.

What kind of fish is Flounder?

  • In the movie and related lore, Flounder is described as a tropical fish, not a true flounder.
  • Marine fans and writers commonly point out that his rounded body, upright swimming, and bold yellow-and-blue colors match cartoon-style reef fish more than flatfish.
  • The most popular theory is that his design draws heavily from angelfish or comparable brightly colored reef fish, but Disney has never confirmed a specific species.

Why his name is “Flounder”

  • Real flounders are flat, bottom-dwelling fish that lie on the seafloor and use camouflage, which is nothing like Ariel’s sidekick in the film.
  • The name “Flounder” is understood as a playful, ironic choice meant to sound cute and memorable rather than biologically accurate.

So if someone asks “what kind of fish is Flounder from The Little Mermaid?”, the simple answer is: he’s a cartoon tropical reef fish, probably angelfish-inspired, and definitely not a real flounder.

TL;DR: Flounder is a stylized yellow-and-blue tropical fish, likely based on angelfish-like reef fish, and his name is just a fun joke—he’s not an actual flounder.

Information gathered from public forums or data available on the internet and portrayed here.