OCELLARIS CLOWNFISH
The False Percula Clownfish of the fish world, the Ocellaris can be considered the Percula's more docile and easier to take care of cousin. That's a mouthful! Speaking of mouthfuls, these fish are small and range only around 3" in a marine aquarium and shouldn't be kept with large carnivorous fish as they will become fishfood. This is one of the best fish for a beginner and thrives in only a 20 gallon tank with the presence of a home anemone. These are a peaceful bunch and will normally not bother other damsels, clowns, or small fish. While they don't show aggressive behavior, they make up for it in appetite. They are pigs to say the least and should not be overfed, even though they will eat almost whatever you give them. Their diet can consist of almost and herbivorous or carnivorous food items. The waters of Indonesia and the Maldives are home to these guys in the wild.
PERCULA CLOWNFISH
At 3", the Percula is one of the smaller clownfish and should probably not be kept with large, carnivorous fish. This little guy will do fine in a 30 gallon tank and though not as hardy as the Ocellaris, after acclimation, they will accept most herbivorous and meaty food items. And when it comes to care, these fish are not for the inexperienced aquarist. Yes, they do look quite similar to the Ocellaris, but the Ocellaris is a better fit for a beginner as the Percula can be stubborn. The Percula is native to the waters of Australia, Indonesia, Singapore, and the Solomon Islands. In your home aquarium, this fish would prefer a good amount of live rock and an anemone will most likely be appreciated, but is not needed.
TWO BANDED CLOWNFISH
Quite the sight is this clownfish, but it can quite the diva, almost requiring an anemone as a palace. Not to mention, they can be a bit pricey. Their colors can range from orange, yellows (as seen in the picture), tans, black, and white. At 5 to 5.5" this Red Sea native is average-sized, but can be aggressive towards other clowns and small tank mates. It is recommended that this fish be put in a 30 gallon or larger tank last. These princesses are lively fish though and can bring character and personality to any aquarium. They can even be good with the larger than average sized fish, as they aren't tiny. They also aren't that picky about their diet, as they will readily accept most carnivorous and herbivorous food items.
CLARKII CLOWNFISH
One of the hardiest fish around, this clownfish makes a great fish for novice aquarium owners. This particular fish is native to Australia, Indonesia, the Maldives, and the Solomon Islands. Bigger than most clownfish, it reaches up to 6" and requires a 30 gallon tank at the least. The coloring patterns range from an orange or tan color with black and white. The black can cover most of this fish's body with white stripes running across it's side. Although this is a great clownfish for an aquarium with larger fish, it may become semi-aggressive towards other clowns and unless you have a mated pair on your hands, it's best to have only one. You can feed this fish just about any meaty foods and any herbivorous food items. Being an anemone fish, they do also prefer an anemone to call home.