Jolthead porgy [Calamus bajonado]

The Sparidae is a family of fish, included in the order Perciformes. The fishes of the family are commonly called breams and porgies (North America). The sheepshead, scup, and red sea bream are species in this family. Silvery porgies are solitary and stay near the bottom where they feed on shellfish and crabs.

Wikipedia has no article on Jolthead porgy.

Picture: Cozumel, Mexico by Sami Salmenkivi