My new wc senegal is now trying to bite my 12 inch polly polly at one point he was hunting it the polly polly just swims off but I have some minor damage on its tail the senegal is growing very fast it is now 9.5 inches it was about 9 inches when I bought it 4 weeks looks like I am going to have mt hands full with this one. it doesn't go after my cb senegal yet.