Urgent My coral is going BALD ! help.

I'm not sure about the species of these polyps , anthelia/ xenia? Over the last week there has been a balding spot that seems to be getting bigger. Something's EATING my polyps, any ideas? :-/





Fish list

Maroon clownfish pair
saddleback clownfish pair
clarkii clownfish pair
blue damsel
azure damsel
humbug damsel
purple stripe pseudochromis
six line wrasse
Flametail blenny
sailfin blenny
powder brown tang
yellow tang
Foxface Lo
Flasher Wrasse
Multicolor Lubbock's Wrasse
hawaian fancy bicolor anthias
long nose hawkfish
2x firefish

inverts

fire shirmp, skunk shrimp

a few pest crabs, could the crabs be munching on my polyps? noooo :-[

 

Maybe one of the Tangs took a liking to them but my first guess is a Nudibranch of some sort. Try looking with a flash light at night after the lights (all, room included) have been off for a couple of hours.

 

First guess would be tang or foxface but looking at the bald spots, it appears a path was eaten through the polyps. I would think a fish would strike random polyps and not make a clearing. I agree with unclejed, It may be a nudi or crab.

Jack

 

A nudibranch was my first thought too, also they look like clove polyps.

 

Those are beautiful glove polyps.

My bet is on the pest crab. Hang out around 2-3am and see what you find.