Here are the best pics I was able to get. He’s just going around the side glass which has a lot of film algae on it cause I mostly just clean the front. He doesn’t seem to be eating it tho as I watch him. Not once has he truly stopped moving and again I haven’t seen him actually eat the algae. But maybe he’s just looking for more hair like algae? I don’t know. I’ve never had a nudibranch and I didn’t really want one. But if it’s something that is safe to have in my tank then I’ll let it stay. Any help is greatly appreciated and I’ll stop the rambling here