What is this?! On frogspawn

[The_Underwater_Gardener]

It seems to be a worm in this reddish casing

 

[Crabs McJones]

I see pineapple sponges and a vermetid snail

 

[The_Underwater_Gardener]

Also there’s is a bunch of white things on bottom of frag plug. Just did 5 min freshwater dip and removed white things

 

[cracker]

I think The white things on the plug bottom are the sponges these are good filter feeders.
Great pics !

 

[The_Underwater_Gardener]

I read that I should try to get rid of the vermetid snail, possibly by covering its opening with reef safe epoxy like the polyp lab coral glue?

 

[reef lover]

Yup or break off