ing ▁rivers ▁of ▁Pan ama ▁to ▁the ▁C au ca ▁River ▁in ▁Colombia . ▁Its ▁range ▁also ▁includes ▁the ▁Cat atum bo ▁River ▁in ▁northern ▁Colombia , ▁and ▁Lake ▁Mar aca ib o ▁in ▁Venezuela ▁into ▁which ▁it ▁flows . ▁This ▁fish ▁is ▁a ▁very ▁toler ant ▁species , ▁able ▁to ▁with stand ▁considerable ▁variations ▁in ▁temperature ▁and ▁sal inity , ▁as ▁well ▁as ▁low ▁levels ▁of ▁o xygen . ▁ ▁E col ogy ▁An ▁om n iv ore , ▁P . ▁c auc ana ▁fe eds ▁on ▁alg ae , ▁on ▁mos qu ito ▁lar va e ▁and ▁on ▁insect s ▁that ▁fall ▁onto ▁the ▁water ▁surface . ▁Pro pos als ▁have ▁been ▁made ▁to ▁use ▁this ▁species , ▁as ▁well ▁as ▁the ▁closely ▁related ▁gu ppy ▁( Po ec ilia ▁ret icul ata ), ▁in ▁bi ological ▁p est ▁control ▁of ▁mos qu ito es . ▁The ▁C au ca ▁mol ly ▁is ▁a ▁live b ear er ; ▁the ▁female ▁produces ▁a ▁batch ▁of ▁ten ▁to ▁twenty - five ▁live ▁young ▁after ▁a ▁gest ation ▁period ▁of ▁about ▁four ▁weeks . ▁The ▁ju ven ile ▁fish ▁are ▁c ared ▁for ▁by ▁the ▁male . ▁ ▁Use ▁in ▁aqu aria ▁This ▁fish ▁is ▁sometimes ▁kept ▁in ▁aqu aria . ▁It ▁does ▁best ▁at ▁temper atures ▁of ▁between ▁ ▁in ▁well - a er ated ▁conditions ▁at ▁a ▁p H ▁of ▁ 7 . 0 ▁to ▁ 7 . 5 . ▁ ▁References ▁▁ ▁Category : Po ec ilia ▁Category : Live