Is this a hydroid?

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PhilMStudy

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PhilMStudy

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It has “tentacles” that extend out a half inch - inch or so at night...

Ill keep an eye out for new snails
 

NoahLikesFish

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hydroids only kill pods and plankton they might irritate coral but they are hard to keep alive in aquaria. i managed to get a few in my tank that i collected if i decide to buy a pygmy angel they are good live food
 

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It has “tentacles” that extend out a half inch - inch or so at night...

Ill keep an eye out for new snails
The collonista are very small. They get much bigger than the ones in my picture.
If you have corals, keep an eye out for nudibranches. Some lay eggs similar to that as well.
 

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PhilMStudy

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I did buy some tiny snails from reefcleaners, wonder if that’s what is happening

does scraping them off glass kill them?
 

vetteguy53081

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Agree- Like collanista or other would be Columbellid snail eggs but thinking collanista. Unlike many snail eggs which do not have a high hatch rate, collanista usually do. Harmless tiny pea size snails
 
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