Almost any white spot(s) has been called Marine Ich. There are several conditions which resemble Marine Ich unless the aquarist looks very closely. Sometimes a clinical inspection is necessary to be sure. A prime example is mistaking Lymphocystis for Marine Ich. When the Lymph clumps are very small, and often at the outset of this condition, it can appear to be like small white spots.
Some flukes or small worms may appear to be 'white spots' at certain stages of their development. To the uninitiated: trichodinid parasites, small isopod infestations, copepod infestations, bacterial infections (usually indicative of a systemic condition), and even the rare Epitheliocysis has been reported as Marine Ich.
In general, some people even report Marine Ich on fish which have small lesions caused by any one (or multiple) of quite a large number of possible organisms.
This is, in part, the problem with reports of the so-called 'reef safe' miracle cures for Marine Ich in reef tanks --- did the aquarist properly diagnose the condition to begin with?
I trust Psionicdragon and don't think this is the error in this case. Still, it is on the list.
