[ilovemash]

Clown fish are known to go in small schools sometimes so yes this is very do-able. Rule of thumb with fish in a tank, or at least with mine, is 1-2 inches of fish per US gallon. A few things you should note though. First clowns can be very territorial when it comes to an aquarium, so add them all at the same time or close to it, if you add them at separate times you risk have territorial feuds between your fish. The one clown that I know of that is really not compatible with other clowns is the Maroon clown fish, and/or Gold Stripe maroon clown fish, these clowns are extremely territorial and should be kept alone or if you are lucky enough in a mated pair. Other than that I am pretty sure most clowns will be ok with each other. You may want to monitor the tank at first to see if there are any discrepancies between the fish. With clown fish there is system of dominance, the largest clown is the female followed by smaller males in the species. Another problem you may encounter is the dominant female of one species fighting with the dominant female of another species, just something you may want to take note of when adding fish. As for anemones, that is a tough one. You would probably want to add quite a few anemones to the tank, but realize unless they are mated the clowns will rarely share an anemone. Also you risk the chance of not one clown adopting the anemone, but that will be rare in your case.