my little mudskipper was attacked by my big one. its whole tail flesh all the way to the first back fin is all white and gray and the only place i have is a 2.5 gal to keep him in. i dont now what to do right now he is in with the big skipper and he is in one spot of the water. please any suggestions would be great hes only like 2 1/2 inches at the most and the bigger one is like 5 to 6 inches