Emerald Crabs losing color

[outdrsyguy1]

I have an issue with my emerald crabs going from deep green when i get them to white. I don't have an iodine test kit and i do have some large softies in my tank. Are there any other possibilities? i have very, very minimal algae.

see attached pic

 

[outdrsyguy1]

View attachment 59061
fyi the white spots are NOT glare from the flash.
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[enderg60]

Its starving and starting to consume calcium from its own shell.

Feed it.

 

[outdrsyguy1]

they are hard to find a lot of the time, do you think it would eat some nori if I tied it up and left it on the rocks?
my tang doesn't seem to eat it when I put it in there. Sometimes the yellow coris wrasse eats at it but that seems to be it.

 

[enderg60]

definitely. Mine would eat nori off the clip when it was within reach of the rocks.

 

[jennm]

Has it molted recently? While EnderG60 may be correct, I've seen them look a little pasty a few days before molting.

Jenn

 

[outdrsyguy1]

I have three, but I don't think I've ever seen them molt. One is probably six months old and the other two for about two months. I figured it was an iodine issue but didn't realize that's what they did when they didn't get enough to eat.