fish parasite

Hello guys i need to identify this guys photos made under microscope by 4x. they were on African Grunt fish, after his death, Who are this guys?

Hi, any idea what kind of thing could this be? I found it already 3 times in my quarantine tank where I have several fish now for one week with UV sterilizer and Ruby Reef Rally.. it looks like internal parasite?… according to the size (approx. 4-5cm) it could be only from Valencienna sexguttata...

I have a pair of clowns that have been together a little over a year now. I'd say the male is 2 years old and female 3 or 4. They've been behaving very much like pre-spawn for the first time with the male clearing out a spot (picking up sand and moving it) and both clearing out areas and doing...

So hadn't noticed anything on my Bicolor blenny till today, but it appears that part of his color is fading in different spots on his body, most on one side. It's almost looks like it is slightly bleached? I'll try and attach a decent pic, but he's easily the hardest fish to get a good pic of in...