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North and Central America: Ciudad Veracruz, Mexico to northern Belize. At least one country reports adverse ecological impact after introduction. 中美洲與北美洲: 到貝里斯北部的 Ciudad 墨西哥非拉克斯州。 至少一個國家報告引入後的不利的生態衝擊。
首次成熟时的长度 / 大小 / 重量 / 年龄
成熟度: Lm2.8, range 1 - 4.2 cm Max length : 4.0 cm TL 雄鱼/尚未辨别雌雄; (Ref. 57749); 6.0 cm TL (female); common length : 2.4 cm TL 雄鱼/尚未辨别雌雄; (Ref. 12193)
背的软条 (总数) : 8 - 10. Distinct line of black pigment midventrally on caudal peduncle absent. Greatest body depth about 2 times in SL. Ventral rays of caudal fin of males not elongated into a sword. Male gonopodium falling short of caudal fin base, without a membranous protuberance, third ray with a strong hook (Ref. 30499). Body shape (shape guide): fusiform / normal. 明显的黑色素的线腹部中央在尾梗上不存在。 最大的体高大约两倍 SL。 雄性的尾鳍的腹面鳍条进入一个剑之内不延长。 尾鳍基底的雄性生殖足落下短,没有膜状的突起, 第三个鳍条具有一个强韧的钩。 (参考文献 30499)
Adults occur in warm springs, canals and ditches with typically slow-moving water, silt bottoms and weedy banks (Refs. 5723; 44091, 44894). Also inhabit creeks and swamps (Ref. 44894). They feed on worms, crustaceans, insects and plant matter (Refs. 7020; 44091). Used for genetic research (Ref. 4537). Several color varieties are popular aquarium fishes, where they attain sexual maturity after 3-4 months and reproduce easily (Ref. 1672). Aquarium keeping: minimum aquarium size 60 cm (Ref. 51539).
