Mike
Retired Moderator
I took some fish food and dropped into the tank. My live rock came alive. Little grey things came out of the rock and grabbed the food as it hit the ground. Looks like shrimp when it grabs the food it curls up around the food. they are very fast moving.
No i could not take pics they to fast and to small.
Found a worm ? red ends and middle of bod was black looked like a center peed ?
In joying this i must spend 1 to 2 hours just looking every night.
Just one of several species of pod that come with the rock, harmless free members of your clean up crew - do a google for amphipods or copepods.
As for the worm, could be a brislteworm, handy to have but painful to touch.