Fish

A fish is any member of a paraphyletic group of organisms that consist of all gill-bearing aquatic craniate animals that lack limbs with digits. Different types of fish exist on human-occupied worlds, Sanghelios, and Forerunner installations, and there were even fish on High Charity before it fell.

Trivia

 * In the level Regret in Halo 2, fish are able to swim through and inside the underwater gondola.
 * In Halo 3, fish appear as yellow blips on the player's heads-up display.
 * In Halo: Reach, fish can be killed by the players, at which point they will float to the surface of the water and bob around.
 * An ice shark is a type of shark found in the waters of Draco III.

List of appearances

 * Halo 2
 * Halo 3
 * Halo: Reach
 * Halo: Broken Circle
 * Halo 2: Anniversary
 * Halo: New Blood
 * Halo: Shadow of Intent