A couple of times I've seen my cleaner wrasse swimming normally then all of a sudden he darts around the tank then dive Bombs the sand a couple of times then goes back to normal, He was also having like a white/brown stringy poop off and on for about a week or two but is back to normal poop now. he looks completely healthy and has a normal appetite so he's been confusing me. i got the fish from dr reef so it has gone through a complete quarantine process and I haven’t added any fish that weren’t quarantined so i don't know how he would have gotten something. I have had the fish for almost a year and I've just started noticing these things this month so i don't know whats going on. could all of this be normal behavior or is there something wrong?