What sort of hydroid is this?

Cthulukelele

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These hydroids have been in my tank for years in small quantities. They grow on glass and rock and their tendrils are usually singular and can get several inches long. Any idea on what kind they are? They don't seem to annoy any of my coral.

1000037895.jpg
 
looks like digitate hydroids
 

HOW MUCH DOES A FISH’S FEEDING REQUIREMENTS AFFECT YOUR STOCKING DECISIONS?

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    Votes: 12 29.3%
  • Quite a bit, but an automatic feeder can change my answer

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  • I haven’t really considered this before

    Votes: 3 7.3%
  • Something else (see my comments in the thread)

    Votes: 1 2.4%
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