 Both hardy and attractive, they are perhaps best known for their symbiotic relationship with Sea Anemones, a relative of coral.In the wild, Anemonefish are always found with a host, leading many potential keepers to believe that an anemone is necessary to keep them.Anemonefish are easy to keep, but their cnidarian counterparts are inordinately finicky and need high light levels, and luckily Anemonefish will thrive without them.