Daas Yochid,
You can’t say ideally and then say it’s muttar. Either you can eat it or not. Bottom line is that if you don’t remove the bugs you can still eat it, therefore the ideally removing is a seperate issue. It would be similar to blood in the yolk of an egg that was never fertilized. It is muttar to eat the egg, would you eat it without removing it? It is muttar to eat the fish. Period. Therefore anaskis is not an issue.
Ideally one whould remove it, seperate issue, but the reason for removing it is not because there is a safek if the anaskis in the fish is an issue.