can someone identify this for me please

that was quick thanks as again im new to saltwater maybe these rock he gave me for a reason.. how do i ride of them.. it also looks to be alot of little feather dusters probably worms everwhere on the rock there white lil tubes with lil red feather..a bunch of them. very small. any ideas on that.
 
Peppermint shrimp have also been known to eat them. The club is doing a group buy on them. You might want to jump in.
 
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