An aquatic, cold-blooded vertebrate animal with gills and fins.

An elongated ten-armed mollusk.

A snake-like fish with a slender elongated body and small, poorlly developed fins.

A large mostly-aquatic arthropod such as a crab, lobster, or shrimp.

A tailless amphibian with a short squat body, moist smooth skin, and very long hind legs for leaping.

An aquatic mammal with a snout, blowhole, and curved dorsal fin.

Note: dolphins are frequently depicted as monstrous fish. The main characteristic to look for is their beak/snout.