Species: Gambusia wrayi, Jamaica Mosquitofish

Gambusia wrayi Regan, 1913

Jamaica mosquitofish

Head and body moderately robust, moderately compressed at rear; head depressed; front nostril not tubular; covering of eye not continuous with skin of head; mouth small, opens at front, slightly oblique, lower jaw slightly projecting, top jaw protractile; jaw teeth consist of an outer row of large backward curved teeth, and several rows of small pointed teeth; 15 (12-16) gill rakers; 1 dorsal fin with short base, at rear of body, 9 (8-10) rays; anal fin origin distinctly before dorsal fin origin in both sexes female with 11 rays; pelvic origin well behind pectoral base, near anal fin, tips of fins of males not swollen; pectorals high on flank, 14 (13-15), modified in male, with 5th ray  scalloped near its tip; 3rd anal ray unbranched; anal fin modified in male to form an elongate sex organ, that greatly elongate organ slender, tapering to a blunt point, with tip curved upwards and with a small recurved hook on its top side, without a fleshy palp; tail base relatively narrow; tail fin  rounded, branched tail rays 14 (12-16); scales smooth and relatively large, 30-33 (31-32) along side.