Suddenlly I heard strange sound coming from the fish tsnk in the other room! When I went there I saw the fish ( it is one fish in a round tank) under or inside the filtter !!!! I quick;ly inpluged the fillter and hlped the fish to swim litter farther than the filter. It went down the tank and layed on its side for few secounds but then it swam good bit slower than it usually dose, (It is almost like Nemo in Finding Nemo movie when Nemo tries to free all the fish from ther tank and to the sea) It is the firs time is see a fish behaves like this in real life.
Should I be worried about it?