The red wagtail 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. They will circle the tank eating anything, including algae, and their breeding can’t be stopped! Like guppies, platies are live-bearing fish.