Purchased 2 onyx clowns on Sat. Both seemed fine in the dealer’s tank. The smaller of the two hasn’t been doing very well….listless, not eating, stability issues. Additionally it developed a white spot on its tail. That portion of the tail then fragmented. The white area has since moved up the tail fin onto the body. See pics. It appears to be spreading quite quickly. There was just a small patch on the fin this morning and now it’s the whole end of the body.
What is it?
-Gregory
What is it?



-Gregory