So I've notice for some time now that little clowns seem to swim up against the face of my big clowns. It doesn't matter when or time of day they'll swim right at its face like it's trying to bite it's eye. Sometimes I'll have 3 small clowns up against my bigger one as it swims... They annoy the big one every time. Anyone know the reasoning to this? It's always some smaller one doing it to another that's bigger... Botia's I have will do the same to the big clowns.