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BiologyFound mainly in rapidly flowing streams and rivers, preferring heavily vegetated habitats (Ref. 26130). Occurs in warm springs and their effluents, weedy canals and ponds (Ref. 5723). Feeds on worms, crustaceans, insects and plant matter (Ref. 7020). Used for genetics research (Ref. 4537). Especially the red varieties are very popular aquarium fishes (Ref. 1672). Aquarium keeping: the males aggressive towards each other; minimum aquarium size 80 cm (Ref. 51539).