I have a brittle star that has white "fur" on it. What do you think? It doesn't seem to be bothering him, eating, color looks good and arms are healthy looking. The white is only on the body part.
Also, how do you --- them, or are they asexual?
what type of white fur? fungus? my two brittle stars also have some sort of white hairs growing all over its body, most noticeable it's legs. they seem to be very healthy? are those white things not a good sign according to what you are saying?