Is this a worm? Bad or good?

[Keen4]

These are all over the place in my substrate. Can someone please help me ID?

 

[v3v3]

Digitate Hydroids
Link

 

[king aiptasia]

Digitate Hydroids
Link

We throw this term around so readily but upon research there is no data, no described species I can find of the animal labeled as a "digitate hydroid". May i ask what parameters define a "digitate hydroid" what family or group of species are encompassed by this term?

 

[v3v3]

We throw this term around so readily but upon research there is no data, no described species I can find of the animal labeled as a "digitate hydroid". May i ask what parameters define a "digitate hydroid" what family or group of species are encompassed by this term?

Biota > Animalia (Kingdom) >Cnidaria (Phylum) > Hydrozoa (Class) > Hydroidolina (Subclass) > Anthoathecata (Order) > Capitata (Suborder) > Zancleidae (Family) > Zanclea (Genus)

1.Link: in German

2.Link:

"Digitate Hydroid" is just a name used in many reef communities for this species.

 

[Zach B]

Could be a bristle worm. More pics?

 

[king aiptasia]

Biota > Animalia (Kingdom) >Cnidaria (Phylum) > Hydrozoa (Class) > Hydroidolina (Subclass) > Anthoathecata (Order) > Capitata (Suborder) > Zancleidae (Family) > Zanclea (Genus)

1.Link: in German

2.Link:

"Digitate Hydroid" is just a name used in many reef communities for this species.

Thank you so much, I've been looking all over to no results

 

[Keen4]

Could be a bristle worm. More pics?

Def not a bristle worm. I have some of those

 

[Keen4]

Here it is with its tentacles retracted

 

[king aiptasia]

Here it is with its tentacles retracted

definitely the Zanclea as suggested earlier

 

[Keen4]

definitely the Zanclea as suggested earlier

Just read about em- Thank you guys! Now to deal with this marine velvet. Ugh- at first I thought it was ICH. I screwed up the qt process and bought new fish too soon at day 45 and added to the DT. Kept the velvet alive on accident.