another unknown hitchhiker for you guys

[whysohigh]

now i need to figure out how to get rid of them, does anything eat these guys? theres way too many now to go in and try and use paste.

 

[slice]

Is there any way to trap them?

 

[whysohigh]

they are hydroids, so no. they are attached to the rock. i need to find something that eats them, so far ive heard pepermint shrimp but have not confirmed this