parasite identification

Got my fish delivery online today, while acclimating I noticed this on its gill just now?! What can I do with this/for this? Thanks for taking time to check this out!

Orange shoulder tang didn’t have this on its front gill yesterday. Just noticed the spot today right before lights turning on. I have ParaGuard that I can use to treat it but before I do so what could this be? It was swimming just fine then started rapidly breathing. It still swimming but...

***Sorry in advance for the long read***if you’ve had experience with Ich/Brook…I would love your advice and feedback! Starting a week ago I noticed my black clownfish had what I thought was Ich. Initially I did RODI dip—helped significantly, almost all spots fell off and started treating DT...

My powder blue tang is 3 years old and has been healthy and happy up until a couple weeks ago. He started acting odd and I noticed he had what looked like small white strings coming off of his head. I freshwater dipped him and it seemed to have work for the time being. Fast forward a few more...

My Fire Shrimp had a normal molt and for fun I looked at the old exoskeleton under my microscope. Is there a way to find out what sort of things live on a shrimp normally? Or if some of these little guys just live in the saltwater in general? Interested if anyone has good resources or knowledge...