Rachovia is a genus of annual killifish, native to seasonal savanna pools and marshes of the Venezuelan and Colombian llanos. Like other annual killifish, Rachovia species live fast: eggs are deposited in the mud at the bottom of a pool, and the adult fish's entire life cycle plays out within a single wet season before the pool dries up. The eggs themselves survive the dry months buried in damp substrate, in a state of diapause, and hatch once the rains return and refill the pool. The atlas's three species - brevis, maculipinnis (mottled annual killifish), and pyropunctata - are modest fish of 2.5–3 in.
Among killifish specialists, Rachovia is a recognized and actively kept annual genus, prized as much for that dry-season-surviving egg strategy as for the fish themselves - breeders raise them over peat moss that is later dried and stored to mimic the natural dry season, then rewetted to trigger hatching. They are rarely seen in general tropical fishkeeping outside that specialist niche. Conservation status is reassuring for the species assessed, rated Least Concern, with one atlas species not yet evaluated.