crab eating coral

First time posting, I hope this is the correct sub forum. I found this little hitchhiker hiding in my GSP rock. Today it was snacking on my hammer so definitely not friendly. Can anyone ID it, please? It's not a gorilla crab, and someone on Reddit said it's a Calico crab. I'm in Southeast...

I recently posted about a concerning decline in my reef tank corals with seemingly no cause. My parameters have always been good and stable for the most part. I was very confused because an entire colony of 12+ rasta zoanthids and a smaller frag with 3 polyps disappeared overnight, but that was...

Can anyone help me ID this crab and is it coral safe? I noticed my zoas have been looking poor and dissapearing and not sure if this guy is to blame. Video is attached along with some photos. cheers

I just picked up an emerald crab for my 10g nano and I have so far one toadstool in there. After checking up on him, i noticed he was crawling on my toadstool that was previously opened and now all shrunken up. I also noticed a tiny chunk of my toadstool missing. I am so mad!! I love my little...