What is it

[KQuillan]

This is a new thing.?

 

[ying yang]

Some kind off hydroid in medusa stage would be my guess ? .interesting little critter though and not entirely sure on definitive answer sorry

 

[ying yang]

Are these Hydroids?

I woke up and found these on my aquarium glass. They look like tiny starfish. From reading online, they seem to be hydroids, is that correct?

www.reef2reef.com

Similar to yours but yours have longer trailing tentacles/arms.
Ummm