These are eating my GSP

[Hoosier]

I am not sure what they are but I am more than to buy something to eat them.

 

[Hoosier]

Sorry my phone is a POS!
What are they?

https://imgur.com/a/RygoM

 

[deputydog95]

They're doing you a favor. Nuisance coral.

Sent from my SM-N920V using Tapatalk

 

[AlSimmons]

It might be some type of Isopod.

http://reefkeeping.com/issues/2002-05/rs/

 

[Sk8r]

Bring your water to the parameters in my sig line. See if that helps. GSP is nearly impossible to kill, if it's at standard parameters.