Chomper Fish

Unidentified Life Form 23 is a type of fish that was preserved by being frozen in ice in the Phendrana Drifts in Metroid Prime. The organism seems to possess a large lower jaw, possibly with a single sharp tooth at the end. The ice it is in cannot be melted or destroyed, leaving it frozen in place for years or perhaps even millenia. Other members of the species could have gone extinct or left the area, as there do not seem to be any live individuals in the game. Most known members of the species can be found in a few rooms in the deep ice caves surrounding the Gravity Suit, such as the Gravity Chamber and the Chamber Access. Some considerably larger specimens can be found in the Phendrana Canyon within the ice halfpipe, and can be scanned. One of them can also be seen and scanned resting on an object (if not destroyed) at Research Lab Hydra, likely placed there by a Space Pirate. It is possible that the unknown creature is a reference to Gyorg from The Legend of Zelda: Majora's Mask.

Scans

 * Phendrana Canyon:"This fish appears to be frozen under a sheet of extremely smooth ice."