Hi, I have a 90 gallon reef tank, and inside i have about 5 fish. One fish, a yellow coris wrasse had a bug that was white which stuck to its body and sucked its blood, and within 15 minutes the wrasse died. I took the dead coris out and i pulled the parasite out of the wrasse and cut it in half, and the parasite was filled with blood that leaked out. So basically at first the parasite was white on the wrasses skin then after it became brownish black after my coris was dead. Sometimes i also see this on my other fish but they seem fine. But now 2 of my fishes are dead due to this. Please help me if you know any way to cure this problem or even the name of the parasite. Thank you