What are these in my QT?

[reefin_with_the_fam]

Can someone please identify the red circles. Two kinds of critters. The first photo each of the circled have like 5+ appendages. The second photo it’s moving. And there’s a TON of both. This follows a second round of GC in this tank.

 

[El_Guapo13]

First look like hydroids. Can't tell what second are.

 

[KJ]

Second.

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