Amphiprion biaculeatus, commonly known as Spinecheek anemonefish, is the largest anemonefish and was known as Premnas until recently. A. biaculeatus is generally less dark in body colour compared to epigrammata and the males have white bands. Females have white bands when young, but the first band may become yellowish when grown up, but never as bright as epigrammata. the bands are thin, and usually get thinner the older they get.
These anemonefish can best be kept as a pair. When buying a pair you don't need to worry about male or female because these fish are hermaphroditic. This means the most dominant fish will automatically turn into the female when there is no other female around. Food wise, these fish are easy to feed. They're omnivores and will eat almost anything you offer. Just make sure they receive a balanced diet of live/frozen food and be sure to include some good quality pellets or flakes. These fish may have a hard time settling in an aquarium with aggressive fish, so it's best to introduce these fish before other more aggressive fish are introduced.
As long as no predators are around (which usually isn't the case in our aquaria), there is no need to add an anemone. They might find shelter in another large polyp coral or just hang around a certain rock. If you want to see the symbiotic relationship they've with their host in nature you need to buy a Entacmaea quadricolor, because this is the only anemone it's associated with in the wild.
