Unknown hitchhiker on glass

[Shergar11]

Just noticed some sort of creature on my glass hope u can see it in the picture, it's about a fingernail width long with 2 antennae type things on front and things on its back, there is also another similar looking one on the glass but is only about 5mm long and looks like a baby version, should I remove them or leave them be ??

 

[GHill762]

I can't see photos but Google colonial hydroids and see if that's a match..

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[cdness]

Maybe a nidibranch?

 

[GHill762]

Maybe a nidibranch?

I logged in so i could see it on the browser, +1 on nudi/sea slug

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[Shergar11]

Thanks for replies folks should I remove them? Am I right in saying that this could be causing a zoa colony I have to only have about 3/4 of the heads open ? Maybe need to get a coral dip ?

 

[allabout]

Depends on what type of nudi it is. Zoa eating nudibranches would be visible on your zoas too. Look reeeeally closely because they often look exactly like the zoas. Generally though if you aren't sure, take it out.

 

[solar]

Freshwater dip the zoas it will kill the nudis and the eggs. Do this once a week for 3 weeks

 

[Shergar11]

Nice one mate cheers :-) al have good look once the kids r in bed c wat I can see, wouldn't do any harm to give them a dip tho will it ?

 

[solar]

Nope will not harm them at allo you van even get more crazy and mix tankwater and peroxide anout 70% tank water 30% peroxide and dip them in that for 5 min it will kill everything that is on the polyps with no harm dont to the polyps.