I'm noticing that some of the small fish in my pond have patches of a fungus looking stuff on them. Have observed it on fatheads, BG and LMB fry.

Seem to be on maybe 1 in 20 fish. Tho may just notice them more as they stand out. Any ideas what this stuff is?

Have also noticed my small BG fry often have white lice type things attaching to them.