Male Clownfish
 

Is it normal for a male clownfish (ocellaris) to swim on its side most of the time and not eat? He has been like that for 4 days now. The female is healthy though.

Did you add any fish recently?

Mine does it too from time to time, I was told that's what clowns do sometimes. If you don't see anything wrong with him then he should be fine. If you see him struggling to breath that's a sign of an infection.

The only problem is it hasn't been eating.

That's bad if he's not eating, he may be sick you should watch him and you may need to quarantine him if it's getting worse.

Maybe try other food? Flake, pellet, frozen shrimp or live shrimp etc