lawnmower blenny

[Gilbert]

how many lawnmower blennies can you keep in a 55 gallon? would 2 or more fight with each other?

[fishforlife]

I believe that they would fight each other...

[dmweise]

One would be the best. They can get rather big and go into every nook and cranny in the rocks. I have one and he does make his presence known. I think you'd need a 75 or 90 gallon tank to have two.