Gall crabs - harmless symbionts or damaging parasites?

[Jennifish]

I’ve recently purchased a trachy, and it’s become apparent there is a couple of gall crabs present. I’ve seen (and been told) different things about them with regards to if they’re harmful/harmless.

Should I remove or leave alone? The trachy is inflating nicely during the day and seems otherwise happy.

 

[Rocks reef]

It appears the flesh around the crabs is not the same coloration as the surrounding tissue. They are generally considered harmless and beneficial. Removing them may damage the delicate tissue. I would observe the coral and see if you notice any negative effects of having them reside there.

 

[dvgyfresh]

Remove asap would be me. I had one in my elegance and it changed visibly after removing it , more full, more open . They burrow into the flesh and can cause damage