Most likely, they are parasites. They are harmless to you if well cooked. I've eaten a lot of them and I expect you have too. However, I will never develop a taste for sushi.

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 Grandpa