Pinhead size jellyfish

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the3rd

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Can anyone please help me identify this? IMG_2123.jpeg IMG_2122.jpeg IMG_2121.jpeg
 

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I am still new at this but it could be a colonial hyrdriod? Turritopis dohrnii in the medusa stage
Probably not that exact species in this case, but medusa stage hydroids of some variety would be my guess here too:
Medusa stage hydroids - they're common in newer tanks. Unless they're a photosynthetic species or you have enough pods for them to feed on in the tank, they should go away after a while.
 
I’m not sure what hydroids are. I looked it up and think maybe some kind of jellyfish. Are these bad for my Tank?
Probably not that exact species in this case, but medusa stage hydroids of some variety would be my guess here too:
 
I’m not sure what hydroids are. I looked it up and think maybe some kind of jellyfish. Are these bad for my Tank?
They're related to jellyfish - they're little organisms that have a medusa stage and a polyp stage; during the medusa stage, they look like little jellyfish, and during the polyp stage they can look kind of like corals, "Aiptasia" anemones, or feather duster worms.

They're generally considered pests because they may sometimes sting other things in the tank; they're generally not a problem unless they reproduce though.
 
They're related to jellyfish - they're little organisms that have a medusa stage and a polyp stage; during the medusa stage, they look like little jellyfish, and during the polyp stage they can look kind of like corals, "Aiptasia" anemones, or feather duster worms.

They're generally considered pests because they may sometimes sting other things in the tank; they're generally not a problem unless they reproduce though.
Oh okay thank you very much! I do have alot of little white feather dusters on my live rock!
 
Oh okay thank you very much! I do have alot of little white feather dusters on my live rock!
Yeah, real feather duster worms are harmless/beneficial - colonial hydroids (which can sometimes look relatively similar to feather dusters) have a sting that can be harmful.
 
Yeah, real feather duster worms are harmless/beneficial - colonial hydroids (which can sometimes look relatively similar to feather dusters) have a sting that can be harmful.
Im hoping they are feather dusters
 

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