I had a large chunk of SW rock that I bought dry and had in one of my FW tanks with some Marbled crayfish.
When I started up my salt tank I recycled the SW rock into the reef.
Months later I start seeing zoas disappear and snails shells start showing up empty.
One night with the moonlights on I spot a now quite large crayfish scuttle out of a hole in the rock and start chomping on zoas.
I took a metal rod and went all swizzle stick on his @$$
Problem solved...
