Species: Anoptoplacus pygmaeus, Pigmy jawfish, Pygmy jawfish

Anoptoplacus pygmaeus Smith-Vaniz 2017

Pigmy jawfish

Elongate, compressed, tapering body; large bulbous head; front nostril a simple tube, without a cirrus; eye large, high, bones and lower rear part of eye plate-like, open at sides; mouth terminal, large, extends well to rear of eye; rear of top jaw bone straight, without notch or hook on underside at rear; jaws with a single row of straight, slender teeth; fin spines flexible; dorsal and anal fins with long bases; dorsal X-XI, 11, soft rays distinctly elongate; anal I, 9; pelvic fins I, 5, outer 2 rays stout and unbranched, inner 3 rays weaker and branched, fin base before the pectoral; tail oval, a little shorter than head, segmented rays 14, central 10 branched; lateral line on front of body only, high, reaches under dorsal spines I-III; scales small, smooth, none on head, nape, pectoral base and belly, body with 20-23 longitudinal scale rows.

Reaches 3.1 cm

Preserved fish: pale, top lip darkly pigmented; dorsal fin with a black stripe along front 1/4-1/3 of fin;  male with a black stripe along base of anal fin.

Lives on soft bottom

Depth range  240-267 m

Known only from Arrowsmith Bank, off Caribbean Yucatan.