Fishes of Japan(Nakabo, 2002)
Head moderately large, broad and horizontal dorsally. Snout short. Eye large, on side of head. Mouth protractile, oblique; posterior of jaw distant from anterior margin of eye. Body elongated, slightly cylindrical and posterior laterally compressed; dorsal profile horizontal, ventral profile arched to end of anal fin. Scales large; lateral line absent; longitudinal scales：26-28; predorsal scales：11-13. Dorsal soft rays：7-8; pectoral soft rays：13-14; pelvic soft rays：5; anal soft rays：8-9 (female). Sexually dichromatic; appearance of female similar to female of Gambusia affinis, brownish or grayish, slightly transparent; darker dorsally and grayish white ventrally; male gorgeous, several colorful longitudinal stripes on side of body.
Prefers standing to slow running water, can be found in ponds, paddy fields and slow moving reaches of river, especially vegetated environments. Highly tolerant to low dissolved oxygen and pollution, even occurs in highly turbid canals and ditches. The th
Southern America. Introduced to Taiwan in 1970’ for ornamentation, can be found in whole island of Taiwan.
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