They are hardy fish which inhabit stagnant and slow-flowing waters, making them well-suited to fishkeeping.

[5] Phallichthys species are found primarily on the Atlantic slope of Central America.

Their diet consists mainly of algae and aufwuchs but small aquatic invertebrates are occasionally taken as well.

The gonopodium, then extended in front of the male's head, delivers spermatophores into the female's genital pore.

[2] Though not commonly sold, Phallichthys are easy to care for in the home aquarium due to their hardiness, peacefulness, and outgoing disposition.