Feather duster or anemone

[mtfish]

Most likely a Majano anemone if it’s glowing green.. same as aiptasia but doesn’t spread like crazy… it’s easier to get rid of..

I agree. Looks like a majano nem to me. I would get rid of it as they can spread quickly under the right nutrient conditions.

 

[ISpeakForTheSeas]

I can't tell for sure from the pics (they're understandably a bit blurry, and clarity is really important for nems and nem-like critters), but might it be a ball anemone (Corallimorph)?

The link below has several images of various ball nems you can compare with to see if any look like a match, but they generally have noticeable little, white ball-tips on each of the tentacles.

 

[EeyoreIsMySpiritAnimal]

Looks like a paly

 

[Tyler Drehobl]

Pest nem for sure

 

[ISpeakForTheSeas]

I can't tell for sure from the pics (they're understandably a bit blurry, and clarity is really important for nems and nem-like critters), but might it be a ball anemone (Corallimorph)?

The link below has several images of various ball nems you can compare with to see if any look like a match, but they generally have noticeable little, white ball-tips on each of the tentacles.

I just realized I apparently forgot to add the link:

An Identification Guide to Corallimorphs in the Reef Aquarium

The morphological differences that serve to separate anemones, corals and corallimorphs (i.e. “mushrooms”) are not always obvious, and perhaps nowhere do th

reefs.com