I placed a mated pair of false perculas and a tomato clown in a 75 gallon at the same time, thinking that they would have plenty of room and define their own territories on seperate ends of the tank. Plus, I thought the whole 2 against 1 matchup would be a deterrent to any tomato aggression. It didn't happen. What did happen was a battle royale of clown fighting which the tomato was winning. When all was done, the tomato was scooped out and placed in solitary confinement in a 12gal eclipse tank, while the mated pair stayed in the 75gal. the moral of the story; never mix tomato clowns with less aggressive clowns. They are bullies.