I've recently noticed some cloudy spots on my puffer's fins, with one of them being larger than the rest. He was in quarantine before we put him in the tank he lives in now, and no other fish have been added. We also only feed frozen prepared foods. He's swimming, eating, and exploring happily with no change in behavior. His eyes are also still bright and sparkly. Is this anything I should worry about or just monitor and see if anything changes? I really don't think it could be ick but I'd rather be safe than sorry.