I have a molly in the same condition he seems to be paralyzed or somthing. When I got him at the lfs he jumped right out of the tank and landed on the floor (my first fish, dalmation molly, named him FLIPPER) should have picked a different one but joked and said he really wants to come home w/me so I still took him. Had him in my 40 gallon for about 2 weeks he swam funny like his backend was broken, then introduced a Powder blue dwarf gourami all of the sudden I have a missing molly(still have not found a week later) so I bought a hospital tank this weekend and put the PBD Gourami and the molly w/broken backend (sometimes only stays on top sometimes only on bottom) in the hospital tank. I dont know if the molly got injured at the fish store when he jumped out or mabey the gourami did somthing (I do think he ate my other molly) just watching them together in the tank so far so good. But can fish injure themselfs by jumping out like that and is there somthing I can do for him. I have had him about 3 to 3 1/2 wks now. PS he (molly)is eating just fine, as for the gourami he did not eat for a week and 2 days bought some brine shrimp and he ate for the first time yesterday. (mabey he was full of my other molly for a week)