I noticed a white dot on one of my Ctenos and thought its just a piece of sand. But it did not go away so i feared its ich...I catched him out and took a closer look on it. It was on his back, very close to one of the spines of his ventral fin. I scratched with my fingernail on it and it "plopped off from it´s fix position and started to crawl away. It´s some kind of small worm. The fish feels happy, eats good and swims around normal. So what is this?



