Yesterday I picked up a Valentini Pufferfish for my new Biocube. The tank was cycled with live rock and sand, and I added the puffer, a margarita snail, 2 Nasarrius snails, and a Trochus snail yesterday. After adding it to the tank, I noticed that my puffer had some tiny white dots on its dorsal and caudal fins. Are these normal color variation, or is it some kind of parasite? My boyfriend keeps freshwater aquariums, and he noted that it reminds him a bit of Ich. If it is some kind of marine parasite, what treatment options would you recommend before I add anything else to the tank?