I HAD A SEABAE, GOLD MAROON AND A CLOWN ALL IN THE SAME 105 GALLON TANK FOR A YEAR. THEY NEVER FOUGHT AND ALL DID VERY WELL. THEN I HAD A TANK PROBLEM AND ALL FISH DIES. IT IS NOT RECOMMENDED BUT IT IS POSSIBLE. I GOT THEM ALL ABOUT 3/4 INCH LONG AND PUT THEM ALL IN TOGETHER. JUST WATCH THEM IS...