Marine velvet disease is known by a variety of names including amyloodiniosis, marine oodinium disease, oodiniosis, and gold dust disease. 

The most common parasite in both fresh and saltwater is Ich (Ichthyophthirius multifiliis) or white spot. Others frequently found include Anchor Worms, Black Spot, Costia, Gil Flukes, Hexamita, Fish… 

The best prevention against disease is to keep your fish healthy in a stress-free environment. A varied diet, stable temperature, and good water parameters are key. If they do get sick, use this selection… 

Saltwater ich (ick), or "white spot disease" is one of the most common diseases that infect marine fish in home aquariums. It is caused by Cryptocaryon irritans, and is similar to freshwater ich.