One-spot Livebearer

The one-spot livebearer is a small, plain species recognized by the single dark spot in the middle of the body, below the dorsal fin. Males are 2.5–3 cm, females around 5 cm. Its best-known form in the hobby is the "golden caudo," with irregular black spots on a golden-yellow background. The genus was comprehensively revised in 2008, and many populations formerly known by this name were split into separate species. It has escaped and become established in the wild in some countries; never release it into the wild.

• 40 liters for a small group; a more balanced colony can be set up in 60 liters.
• 20–24°C is ideal; it lives in an unheated room aquarium. pH around 7, moderate hardness.
• Dense plants and floating plants provide hiding places for the fry.
• 25% water change weekly; gentle flow.

Omnivorous. Fine flakes and micro granules, spirulina food, frozen brine shrimp and daphnia. It also picks at algae on plants and glass.

Peaceful and suited to community aquariums. Males follow the females but do not injure them. Because it tolerates cool water, it is a good choice for unheated setups.

Good companions: white cloud mountain minnows, variatus platies, small corydoras, dwarf shrimp, nerite snails.

Avoid: large and aggressive fish, fin-nipping barbs, tropical species that need water constantly above 27°C.