is it true?

Hum, where did you hear that? =)

Gobys can get ich. I believe all fish can get ich, its a parasite however some fish with denser slim coats (like mandarins) are less likly to get ich as the parasite has a harder time attaching.

But immue, would mean that a fish could not get it and if you do a search I am sure there are pics of gobies with ich.

(in fact, last weekend when I was at my LFS there was a sleeper goby, a small juvi with ich).
 
Heya,
I had not too long ago heard the same thing about mandarins, and believed it. Than a week later while scowering the web to find out whats wrong with my clown fish... I bumped into a photo of a mandarin that most certainly had ich :mad:
I then read up on the matter and found that they are more immune to ich than most fish, but not completly immune. Their slime coating is what helps them keep ich away.
 
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