Guppies have been a staple of the aquarium hobby for generations. There are countless color varieties of guppies. Males tend to have more vibrant colors than females, and have longer caudal and dorsal fins. Many guppy keepers may start out with only one or two fish, but being live-bearers with long-term sperm storage, you may be in for a full tank before long.
Guppies are peaceful, easy-going community fish and play well with a mix of other non-aggressive fish species. You may want to keep them with similar, live-bearing fish, such as platys or mollies. Other good tankmates include small fish such as neon tetras or zebra fish. Keep in mind that any fry spawned from an active guppy female may be dinner for other fish in the tank, so having smaller tankmates will ensure more fry survive.