Fully agree...I'm also sorry to bring bad news but if those "eggs" were moving immediately after being "laid" by the CL, those are likely an internal parasite and the fish should be treated.I don't see any eggs, the "red" looking thing in the pics looks like a camallanus worm. Neither of those loaches appear to be mature enough to spawn, and neither appear to be gravid in the pics. Sorry to be Debbie Downer, but I think that the teacher is mistaken.