Toadfish

[Rihanna]

Any marine fish of the genus Batrachus, having a large,
thick head and a wide mouth, and bearing some resemblance to a toad.
The American species (Batrachus tau) is very common in shallow water.
Called also oyster fish, and sapo.

[Lizzy Liz]

[Toadfish]: An aquatic creature native to Marcland, which is easily distinguishable by its brightly coloured eyes, toad-like face and its long, [finned] tail. The [toadfish], despite its name, is neither a toad nor a fish, but is infact the only known aquatic primate. The toadfish does not eat, and seems to survive purely from sunlight and the happiness of those around it. The toadfish is recognised by the natives of Marcland as a [sigma] of good luck, and is often found as a household pet.

[Dave Paprocki]

Any of a number of fishes with a wide flattened head.