John, It is me again. I saw another answer saying that marine predator diet should include mostly marine animals. So every time I go there I will catch some small bass, and bluegill, and sometimes crayfish. My spotted dogface puffer, trigger, and polka-dot grouper love them. Hi again Kenneth, There should be no problem from supplementing your fish's diet with these native freshwater species.
Problems can arise when the feedings are predominantly of a freshwater origin.
This is because marine fish require long-chain fatty acids, particularly of the Omega 3 class. Freshwater fish consume and contain mostly short-chain fatty acids of the Omega 6 class. If you generally feed a prepared frozen or dried food to your fish they are probably getting enough long-chain fatty acids that way. Problems occur when fish like groupers or lionfish are fed feeder goldfish, guppies, or smelt exclusively. I saw one of your answers to the questioner which you stated that clownfish has longevity.