Well for the first time I think it happened. My 18" tropical gar took a lunge into the glass and now has a slight arch in its back. The reason I call in "minor" is because it doesnt have the traditional broken back curve to it and he can still float and swim around the tank and all fins including his tail still move. Reason I say its broken or bruised bad is cause if he tries to vigorously swim he has a problem and only his body from the bend forward moves fast the rest kinda just sits there. All other broken backs ive seen the gars still cant float at the top and move there tail and stuff... Comments and suggestions please and under no circumstance will I kill this fish