Interesting filter feeder?

[Reefkeepers Archive]

Still going with this

It's a Phyllochaetopterus.

Looks like a spaghetti worm to me still



@vellingapa how long are the arms roughly?



Again, I do trust your ID'S though Phyllochaetopterus (as I can tell from the photos) seem to have a more calcified/smooth tube while I've seen spaghetti worms rapidly construct tubes out of sand like OP has

 

[FernBluffReef]

Still going with this

It's a Phyllochaetopterus.

From what I’ve read. I believe I agree. Thx

 

[FernBluffReef]

Looks like a spaghetti worm to me still



@vellingapa how long are the arms roughly?



Again, I do trust your ID'S though Phyllochaetopterus (as I can tell from the photos) seem to have a more calcified/smooth tube while I've seen spaghetti worms rapidly construct tubes out of sand like OP has

Best guess 1.5 to 2.0 inches

 

[Reefkeepers Archive]

Best guess 1.5 to 2.0 inches

@EeyoreIsMySpiritAnimal might be right then, spaghetti worms have arms over a foot long. My bad

 

[EeyoreIsMySpiritAnimal]

Looks like a spaghetti worm to me still



@vellingapa how long are the arms roughly?



Again, I do trust your ID'S though Phyllochaetopterus (as I can tell from the photos) seem to have a more calcified/smooth tube while I've seen spaghetti worms rapidly construct tubes out of sand like OP has

Spaghetti worms have multiple tentacles, not just 1 or 2, and are relatively uncommon in the hobby. Phyllochaetopterus do not always have calcified tubes. The best way to be certain is to remove one and look at the worm itself. Phyllochaetopterus worms are ooky yellow and black things (and yes, "ooky" is the technical term, lol! They're all blobby and just seem gross to me)

 

[FernBluffReef]

The rock this Zoa colony came on has been full of surprises. First unwanted, Aptasia and bubble algae. Then this Phyllochaetopterus. Two other critters remain unidentified, one I just discovered this morning before the Zoa's open up for the day. Seems the LFS was correct in calling this BlowPop Zoa colony wild

Pic below with blue highlight. Growing out of the rock, looks like fish poop / fabric like but its attached tube structure and waving around seemingly filtering. There appear to be several of these fabric tubes growing on the rock. Any idea what they are?

The other critter (I think is a critter but maybe not), I still struggle with to get a great pic, likely to have to pull rock out and inspect closer in person again which I'm going to do soon to remove some more pesky bubble algae that continues to pop up on the rock. A few stick like structures almost like brittle start legs with joints. When I first discovered this I originally thought was another Aptasia but closer inspection say no the appendages seem rigid and as said like having a joint. Unlike the other critters though, I've not seen this move nor grow but more often than not its largely covered by the Zoas with just part of the appendages poking out and you only see more when lights out and the Zoas are retracted.... and even then you don't see much of it.

 

[ISpeakForTheSeas]

I can't see the second well enough to guess, but the first could be a sponge, tunicate, or worm like a peanut worm.

 

[FernBluffReef]

RE: Second one. I moved the Zoa rock this morning as our Ritteri is on the move and decided it wants that space today.

In the new location, I'm able to see the second critter much better. It appears to be some form of tube anemone I think. New tank is starting to come alive with both good critters and not so good.

.

Thanks for humoring me with the critter ID questions. I'm sure we had LOTs more in the old 180g back in the 80s as it was all Fiji live rock (darn Mantis shrimp killed many of our fish before we took care of it). But its nice to see new critters and relearn as long as most are not too much of pests.

 

[ISpeakForTheSeas]

RE: Second one. I moved the Zoa rock this morning as our Ritteri is on the move and decided it wants that space today.

In the new location, I'm able to see the second critter much better. It appears to be some form of tube anemone I think. New tank is starting to come alive with both good critters and not so good.

.

Thanks for humoring me with the critter ID questions. I'm sure we had LOTs more in the old 180g back in the 80s as it was all Fiji live rock (darn Mantis shrimp killed many of our fish before we took care of it). But its nice to see new critters and relearn as long as most are not too much of pests.

Still a bit blurry for me, but looks like it may be a "Ball Anemone." If so, they're generally harmless:

That's a Corallimorph (taxonomic family Corallimorphidae)/Ball Anemone - despite the name, they're actually related to (and could be considered to be a kind of) soft mushroom corals.

They're generally harmless, though some species can spread enough to cause issues.

 

[FernBluffReef]

Still a bit blurry for me, but looks like it may be a "Ball Anemone." If so, they're generally harmless:

Awesome. Looking at pics of ball anemones - yep that is exactly what this is. Thanks for the awesome ID as usual

 

[EeyoreIsMySpiritAnimal]

Definitely a ball anemone. Very cool critters IMO