Tilapia

7.1 cm SL (male/unsexed; (Ref. 81260))

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Diagnosis: body elongate (Ref. 53405), relatively gracile, its depth 29.9-36.2% of standard length (mean 32.7% SL) (Ref. 81260). Head length 28.4-35.8% of standard length (Ref. 81260). Teeth conical, upper jaw with 2, lower jaw with 3 tooth rows; dorsal fin with 2-4 oval spots posteriorly and a series of horizontal lines anteriorly (Ref. 53405). If present mid-lateral band does not extend over caudal fin; dorsal fin without dark basal band; distance from snout to pelvic fin origin 32.5-37.5% SL (Ref. 81260).Description: dorsal head profile smoothly rounded to snout; snout short, 19.8-35.3% HL, rounded (Ref. 81260). Pharyngeal teeth bicuspid (Ref. 53405). Ventral body wall gently rounded to caudal peduncle which is slightly longer or slightly shorter than deep; 7-9 tuberculate rakers on hypobranchial and ceratobranchial, 5-7 epibranchial gill rakers (Ref. 81260). No micro-gillrakers; scales cycloid (Ref. 53405). Caudal fin rounded (Ref. 53405, 81260) in both sexes, sometimes upper half is slightly elongate and lobe-like in males (Ref. 81260).Coloration: variable with numerous color forms known; upper half of body brown; lips, cheek and opercle yellow; dark lachrymal stripe present; forehead and base of dorsal fin often dark brown; leading edge of pelvic blue, rest of fin purple (Ref. 81260). In live: males: upper part of body olivaceous-brown, lower part lighter, belly tinged with pale yellow; opercular region olivaceous-brown dorsally and light golden ventrally, with orange band below eye and metallic-black spot bordered anteriorly and posteriorly by bright green bands; lips dark yellow (Ref. 53405). Dorsal fin black-edged, with light yellow submarginal band (Ref. 53405), its filamentous tip red-edged (Ref. 53405, 81260). Dorsal spines light blue, interspinous membranes red; memebrane of soft dorsal red with numerous light blue maculae (Ref. 81260). 2-4 black, orange-edged, oval spots on upper part and series of olivaceous-brown horizontal bands on anterior part of dorsal fin (Ref. 53405). Caudal fin dark orange (Ref. 53405)/ red (Ref. 81260) above, with 5-12, usually 6-7, black oval spots (Ref. 53405, 81260). Lower part of caudal fin black-edged (Ref. 53405, 81260), with light blue (Ref. 53405) / white to yellow (Ref. 81260) submarginal band and series of olivaceous-brown vertical bars (Ref. 53405). Pectoral fins light yellow, pelvics light blue, edged anteriorly by broad black band and posteriorly by narrow black band (Ref. 53405). Anal fin red (Ref. 81260) or violet (Ref. 53405, 81260) and black-edged (Ref. 53405, 81260), with many rows of small blue maculae in posterior parts (Ref. 81260). Body scales with dark distal edges (Ref. 81260). Females: upper part of body olivaceous-brown, with darker band running from eye to caudal peduncle; anterior part of head with 2 dark brown lateral bands (Ref. 53405). Lower part of body whitish to light olivaceous-brown (Ref. 53405, 81260) with light greenish tinge on belly (Ref. 53405). Opercular region olivaceous-brown dorsally and yellow-tinged light green ventrally, bearing a golden-orange horizontal band just below eye; lips golden (Ref. 53405). Dorsal fin golden/yellow, except for narrow, black distal edge (Ref. 53405, 81260) and 2 round spots anteriorly (Ref. 53405). Caudal fin golden dorsally, with 1-3 back spots, ventrally transparent, except for some traces of golden spots; pectoral fins transparent; pelvics light green and anal fin violet, both black-edged (Ref. 53406). Chest and belly of ripe females dark red, usually surrounded by broad violet zone (Ref. 81260).

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