Got my Tomato Clownfish the other week. Quite a character and sitting well with my Mono Sebae (brackish). The tank is full marine salinity.
The Tomato loves to dig holes, and I believe he has had a bit of a fight with the Mono as the Mono is missing bits of its tail. Probably over the prized position next to the heater in the tank!
The Tomato has a huge appetitive and eats practically anything, which is on par with what other users on the net are saying. Overall I have to say he is quite a cool fish. Might get him another friend, but the tank is small and tomatos are aggressive.
Tank details: 2ft tank, Salinity 1.020, temp 26C, no anemone, 80% play pit sand, 20% coral sand, Plastic plants to confuse the heck out of the tomato 😛