Prawns or Shrimp?
They are different. Prawns are very territorial. And get large. I have had some success with them, but never by themselves. Only in a poly format, they have a symbiotic relationship with tilapia, I don't beleive it's direct though. I lack the space and equipment to nail down exactly if it's a direct or indirect relationship. Let me know what you find out. I run mine as a seasonal crop, picking up the post larvae in the spring, harvesting in the fall.