The Platy is a pleasant and peaceful freshwater fish that’s both hardy and active. It’s also small, pretty, and a great fish for hobbyists of any level; in fact, it’s one of the most popular in the fishkeeping industry. You can find Platies in several different colors which make for an eye-catching tank. The Platy has two goals in life: eating and breeding. It will circle the tank eating anything, including algae and their breeding can’t be stopped!
Like guppies, platies are live-bearing fish. Breeding the Platy is more than easy—in fact, it’s really just a question of when because they are always willing and able. The females can warehouse sperm for up to six months; they are almost always pregnant and can give live birth to 10-40 fry every 4 to 6 weeks! Huge broods of up to 80 fry are even possible. The parents won’t usually eat the fry, but it’s still best to put the pregnant female in a separate tank or breeding net/box. Let her give birth there before bringing her back to the primary tank.
It’s quite easy to tell a male Platy from a female by examining their anal fins (the rear fin protruding from their bellies). If the anal fin is fan-shaped, your fish is a female. If it’s long, flat, and pointed, your fish is a male. Females are also usually bigger than males, though this is not a hard and fast rule.