What causes white spots on my clownfish?

An infestation of Brooklynella hostilis is commonly known as Clownfish Disease, and although this type of ciliated protozoan saltwater ich is usually associated with Clownfishes as the name ... White Spot Disease or Saltwater Ich is caused by an infestation of the ciliated protozoan Cryptocaryon irritans. read more

It is a very common external parasite called Ich. Generally it is from poor water condition, but it may have had it when you got your fish as you didn’t say how long you’d had him/her for. read more

White spot disease (Ichthyophthirius multifiliis, or Ich) is one of the most common parasitic diseases affecting tropical fish. It is also, unfortunately, a very persistent disease. White spot is caused when a protozoan attacks and attaches itself to a fish's body, fins, and gills. read more

I believe my clown had ich, but the white spots multiplied and it was rubbing so I used ich attack for 5 days and from what I can see it has all but cleared up.I also FOLLOWED the directions for the ich attack and used it for about 4 days after the spots were gone and my little dude stopped rubbing. read more