The Percula Clownfish, also known as the True Percula, or Clown Anemonefish, will rarely exceed 4 ½ inches.The Ocellaris Clownfish (Amphiprion ocellaris) is often confused with the Percula Clownfish. Unless you are experienced with both fish, they are difficult to tell apart. The True Percula is a very bright orange, whereas, the Ocellaris tends to be more drably colored. The Percula Clownfish also has a thicker black outline to its white body stripes.The True Percula is not a fish for beginners. If you want this fish and your experience is limited, purchase the Ocellaris Clownfish. Percula Clownfish are good candidates for a reef aquarium, however, they are not as hardy as the Ocellaris Clownfish. Once acclimated and eating, they are tolerant of most fish.If already paired, the female Percula Clownfish is the larger fish. The Percula Clownfish, like several other clowns, can be bred in the aquarium, and is one of the most common "starter" fish for saltwater breeders.In nature, the Percula Clownfish is an omnivore. In an aquarium, it will readily accept most meaty foods and herbivore preparations.