I have had 2 clownfish in my 20G tank for about 8 months. The only other inhabitants are a male molly and a basic CUC.
Since the day I got the clownfish, they have had a strange swimming pattern. They mostly stay very close to the surface of the tank and often swim sideways. I know clownfish can behave strangely, but every time I see other clownfish, they swim very differently from mine.
They eat well and usually stay near the outflow, they are not very active but I think that is to expect, they also now about double the size they come. Could they have kind of swim bladder issue, or is this normal clownfish behavior? My ICP in attached.

Since the day I got the clownfish, they have had a strange swimming pattern. They mostly stay very close to the surface of the tank and often swim sideways. I know clownfish can behave strangely, but every time I see other clownfish, they swim very differently from mine.
They eat well and usually stay near the outflow, they are not very active but I think that is to expect, they also now about double the size they come. Could they have kind of swim bladder issue, or is this normal clownfish behavior? My ICP in attached.

