My clam [not sure what species, but I think its a maxima} has two circular white fuzzy looking growths on its shell. They are about 3-4 mm long coming off it with holes in the middle. What are these?
They may be parasites....clams are susceptible to them...can't tell without a pic. You need a digital camera...should be standard marine aquarium equipment. SH
are they close to the mantle at all? if they are on the outer surface of the shell chances are they are more epiphytic than parasitic, there arre many critters that will take up residenc on the shells of giant clams, even more in the scuttles of squamosas. I suggest you cut one of the two off, and scrape till you have nothing but shell, if there is no hole and they are not feeding off of the mantle then they cannot be parasites.