Aiptasia??

[EeyoreIsMySpiritAnimal]

I bought the tank from another aquarist one year ago.
It's live rock but I don't know the precedence.

Likely just corallimorphs then. I have tons and they don't bother anything.

 

[corsicoreef]

They are very beautiful.
Would they thrive?

 

[EeyoreIsMySpiritAnimal]

They are very beautiful.
Would they thrive?

Like I said, I have tons.

 

[corsicoreef]

Like I said, I have tons.

How big have yours got?
Mind sharing some photos please?
Thx

 

[EeyoreIsMySpiritAnimal]

How big have yours got?
Mind sharing some photos please?
Thx

They stay small. They're rather hard to photograph since they thrive on the darkened undersides of rocks... I'll see what I can do tomorrow.

 

[colourofair87]

Hi Everyone! I am about 8 months into my first reef tank and I have what seems to be a pest I think is aiptasia, but I'm not entirely sure. Any help would be appreciated!

It's been about 2 months since I introduced new corals and I made sure to dip and QT before adding to the tank so I'm not sure where these came from!

I tried to attach a video (keeps failing) because I noticed when it is loose off the rock it like pulsates through the water.

 

[EeyoreIsMySpiritAnimal]

dang. Looks like a plague of colonial hydroids

 

[colourofair87]

dang. Looks like a plague of colonial hydroids

Thank you! I have been scouring he internet trying to figure out what it looks like most so I can take the right actions steps to get rid of!

I loaded the video in my google drive - this is what it does when it is knocked from a rock.

 

[EeyoreIsMySpiritAnimal]

That's the medusa stage.

 

[colourofair87]

That's the medusa stage.

That sounds horrible! Thank you so much for helping me identify this! Looks like best route is to remove the rock and get these suckers off!

 

[ISpeakForTheSeas]

Hi Everyone! I am about 8 months into my first reef tank and I have what seems to be a pest I think is aiptasia, but I'm not entirely sure. Any help would be appreciated!

It's been about 2 months since I introduced new corals and I made sure to dip and QT before adding to the tank so I'm not sure where these came from!

I tried to attach a video (keeps failing) because I noticed when it is loose off the rock it like pulsates through the water.

Yeah, these are hydroids that are undergoing strobilation (they're about to turn from sessile polyps to swimming medusae):

they may have just finished strobilation (i.e. they may have just finished turning from polyp to ephyra - ephyra being basically a baby hydrozoan and the precursor to the medusa stage).

 

[colourofair87]

Yeah, these are hydroids that are undergoing strobilation (they're about to turn from sessile polyps to swimming medusae):

Thank you so much for the confirmation. I just got done scraping and brushing every last one I could find on my rock work, then did a vac of the sand bed an partial water change. Hoping I got ahead of it before it got any worse!

 

[colourofair87]

Just wanted to share an update for anyone else struggling. The method I used of scrubbing down all the live rock, vacuuming the sand bed, and performing a partial water change has so far been effective at eradicating these the hydroids! Thank you again to everyone for the useful info on these pests!