I mean, from the name alone I can assume the fins are not open as when the fish is flaring. But are clamped fins just anytime the fins are not open? Or does this mean the fish *cannot* open his fins?
I'm curious to know, as when my fish is still and not actively swimming, his fins are pretty closed up. He is a crowntail, so this could possibly make the fins appear to be more closed up than another fin type would (less webbing).
PS - My fish is able to open his fins and can swim normally. He has just been still most of the day. This is the first day since I got him that I have been home all day to watch him, so this might be normal activity. I've only had him a few days.
One more thing, the tank is heated (78 degrees) so it's not too cold.