Species: Poecilia reticulata, Guppy molly, the guppy

Poecilia reticulata Peters, 1859

Guppy

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, at front, slightly oblique, lower jaw slightly projecting, top jaw protractile; jaw teeth consist of an outer row of large backward curved teeth with expanded tips, and several rows of small pointed teeth; 1 dorsal fin with short base, its origin behind pelvic origin, 7-8 rays; pelvic origin well behind pectoral base, near anal fin; tip of pelvic fin of males distinctly swollen, elongate; pectorals high on flank, 5th ray not scalloped in male; anal fin 8 (rarely 9) rays, origin under (female) or a little behind (male) dorsal fin origin; 3rd anal ray unbranched; anal fin modified in male to form an elongate sex organ, that organ relatively short, with straight tip that has small spines & a long fleshy palp that extends past the tip of the organ; tail base relatively narrow; tail fin rounded, without elongate sword; scales smooth and relatively large, 25-28 lateral scales, 14 around the tail base.