Gill from Finding Nemo is a Moorish idol, a real Indo‑Pacific reef fish known for its striking black, white, and yellow bands.

Quick Scoop: What kind of fish is Gill?

  • Gill is a Moorish idol (scientific name: Zanclus cornutus).
  • This is a saltwater reef species found in tropical and subtropical Indo‑Pacific waters.
  • The movie keeps his on‑screen look close to the real fish: thin body, bold vertical stripes, and yellow accents.
  • Fans often note that Moorish idols are delicate and do poorly in captivity, which fits Gill’s constant urge to escape the dentist’s tank.

A tiny bit of flavor

In the story, Gill is the scarred, tough, escape‑plan mastermind of the tank gang, originally taken from the ocean and forced into aquarium life. That personality, paired with a species that struggles in tanks, makes the choice of a Moorish idol a clever character design detail.

TL;DR: Gill is a Moorish idol reef fish, a black‑white‑yellow Indo‑Pacific species that’s famously hard to keep in captivity—perfect for a character obsessed with breaking out of a fish tank.[7][1][9]
Information gathered from public forums or data available on the internet and portrayed here.