most nikon coolpix cameras work well for shooting fish, unless you want to go with a DSLR..which is 100x better than a point & shoot.
you can also look for an SLR like point and shoot, with adjustable ISO settings, and a better system..go to DPreview.com...best camera site around
i use a Nikon D40 which set me back 500 bills, but it was WELL worth it