had a lake like that but it was bluegill the other species most of which were big while a ton of small bass like that, many even funny shapes. we started keeping ALL the bass in that 11-14 inch size, which are great eating too and over time bass started getting bigger and bluegill stayed big and plentiful as well. seemed in great balance.

you could try seining your lake and seeing what the reproduction is like. you could see the smaller fish there that you arn't catching.