What are these little things on the glass?

[kamero87]

Can anyone tell me what this little fella is? I have tons of them all over the glass of my tank, I was thinking possibly brittle stars babies but I have no clue.https://uploads.tapatalk-cdn.com/20201228/1d3e6c4ce9398c4e4d57ad3b1eb220c7.jpg

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[davocean]

Colonial hydroids