I have seen our HSB catch small LMB in deeper water. I know it's not highly thought of but we added gizzard shad a few years back and they produce a lot of food for our LMB, BCP, and HSB. It has worked for us so far. I might add our pond is a 10 A. rock quarry that is 10 to 35 ft. deep. They will eat almost anything swimming in open water they can get in their mouth. Our LMB recruitment is always high so I know they help with that. We have friends with smaller ponds that have HSB and they do very well. They do have a smaller mouth so that limits how large their prey can be. They are very fast and hunt in packs and chase schools of prey to the surface and sometimes come out of the water chasing them down. They are extremely fun to catch.