I know nothing about prawns except what I occasionally read. No help there. Expect the bass and BG to pretty well mop up on the crawdads. For any survival, you will need either a lot of shore line plants or a bunch of rock hotels. Since the rocks don't spread and get out of hand, I'd select those. You might also consider some cut down cedars for structure and protection.

Bass and bluegills in one acre or less Texas ponds take a lot of management/maintenance by culling. Have you considered hybrid bluegills and hybrid stripers? Install a feeder and a good high protein feed.

It's not about the fish. It's about the pond. Take care of the pond and the fish will be fine. PB subscriber since before it was in color.

Without a sense of urgency, Nothing ever gets done.

Boy, if I say "sic em", you'd better look for something to bite. Sam Shelley Rancher and Farmer Muleshoe Texas 1892-1985 RIP