Emmelichthyops

Lore & Background

The bonnetmouth has a cigar-shaped body and can grow up to 13 cm in total length. Its coloration is generally yellowish-gray, with some blue on the front and silvery-white on the sides. Adults have four brown stripes on the upper halves of their bodies (one mid-dorsal), while juveniles have only three stripes; these stripes are usually more evident near the front and become more faded near the tail.

Found only in the western Atlantic Ocean, bonnetmouths occur from southern Florida and the Bahamas to northern South America. They are most often captured near the Florida Keys, US Virgin Islands, and the Bahamas. The type specimens were both collected off Cat Island in the Bahamas. They are generally associated with reefs and can be found over coral heads in small groups, at depths from 3 to 90 m, but mainly occur in schools at about 64 m. The species feeds on invertebrates and small fishes.

Emmelichthyops atlanticus was first formally described in 1945 by American ichthyologist Leonard Peter Schultz, with the type locality given as Cat Island, Bahamas. It was formerly placed in the family Inermiidae. The generic name Emmelichthyops means 'like Emmelichthys', as at the time of its description this species was thought to be related to Emmelichthys and the two genera are similar.

Reader's Guide

The bonnetmouth is significant as the sole member of its genus, Emmelichthyops, making it a taxonomically distinct grunt in the western Atlantic. Its description by Leonard Peter Schultz in 1945, based on specimens from Cat Island, Bahamas, established its unique status. The species was formerly placed in the family Inermiidae, reflecting historical uncertainty about its relationships, though it is now considered a grunt. Its cigar-shaped body, striped pattern that differs between adults and juveniles, and reef-associated schooling behavior at depths around 64 m are key characteristics. The bonnetmouth's distribution from Florida and the Bahamas to northern South America, with highest capture rates near the Florida Keys, US Virgin Islands, and Bahamas, defines its range. Its feeding on invertebrates and small fishes places it within the reef food web. The generic name, meaning 'like Emmelichthys', highlights its perceived similarity to that genus, a connection noted at the time of description. As the only species in its genus, Emmelichthyops atlanticus represents a unique evolutionary lineage among western Atlantic grunts.

Did You Know?

• The bonnetmouth is the only known member of its genus, Emmelichthyops.
• Adults have four brown stripes on the upper body, while juveniles have only three.