I purchased 4 anthias about a week ago along with a six line wrasse. My wrasse died yesterday. He had been doing well until 24 hours before he died. Now today, one of my anthias is on the bottom, breathing fast, and has brown on one side of its body. Does anyone know what this could be and if there is anything I can try to help this little fish? I forgot to mention, they are in a quarrantine tank.