Deep Sea Fish

The Deep Sea Fish, also called the Angler Fish and known as Gumbo in the game's image files, is an enigmatic fish that spawns only if the player makes a typo while living Piranha or Strong Piranha are on screen. Oddly, the game never makes reference to it, or warns the player of its existence.

The deep sea fish, like a Blue Piranha, has just one health point, and is killed by typing a single letter corresponding to the letter displayed on its side, however, the deep sea fish is much faster than either variant of piranha, so it may be a top priority to eliminate it as soon as it appears onscreen, depending on how close the other piranha are to the Diver.

The Deep Sea Fish is the only enemy in the game which is neither a Shark nor Piranha (not counting the Pirate Sub, Robo-squid and Ghost Ship bosses).

Trivia

 * The sprite used for the deep sea fish is a modified version of that used for Gumbo from Insaniquarium.