Help! Random Question

[YVR97]

Finally have it all up and running but I have random questions...

What is this white substance attached to live rock that i added to my tank a few months ago?

My cucumber's shrimp went missing if I get him a new one will they be friends or no point?!

On my coral there is the second weird blooming thing that doesn't match (sorry poor wording...still new). Is it ok? Coral has been in the tank a few months.

Thank you!!

 

[homegrowncichlid]

the white things are encrusting worms of some sort. not an issue.
I'm not familiar with shrimps that live with cucumbers, what did it look like?
That is a feather duster worm living in the zoanthids, looks pretty, hope it spreads out in your tank.

 

[YVR97]

this is the best pic of his shrimp buddy...and yes they are on a jet...I was adjusting them all and saw this happend