Long Black and White Footed-Worm

[Slapp]

No clue what this is. I’ve seen it a few times. Macroalgae tank. No fish.

 

[Slapp]

Videos seem not to work, so here are pictures however these aren’t clear and crisp.

Also it is NOT a brittle star leg. As some might say it is.

 

[ying yang]

People may have trouble viewing your videos,as some don't want to or don't know how to download the video or just scared off unknown downloading stuff.

Most upload to youtube then share link here,then everyone can simply click and watch.
Good luck

 

[ying yang]

Adding picture is good idea.
Good luck

 

[ying yang]

Reminds me of a banded pipe fish but you say worm, so guessing it slithers like a worm,but some off tje more knowledgeable people will chime in soon

 

[JGT]

Blurry pic but could be dorvilleidae worm.

 

[cdnco2004]

First video the movement looks like a worm but the second video it seems to be swimming like a fish...

 

[MoshJosh]

This? whatever it is?

Ruler worm?

Okay, I don't know the identity of this worm yet, but it's too interesting not to post a picture, and perhaps someone out there can help wit...

bodegahead.blogspot.com

 

[vetteguy53081]

Havent seen these in a very long time but looks like Eusyllinae worm. Moves very fast and hangs in substrate scavenging for uneaten food.

 

[ying yang]

Picture reminds me off a banded pipeworm but just downloaded video and acts like a worm,and has them front feelers like dorvidea worm has but all I can say,hopefully positive id above for you from others.
Good luck and cool little critter indeed

 

[Slapp]

Positive ID on the Syllidae answer.
Thank you guys!

Definitely a cool critter. It moved eerily. Most image results have a transparent worm, so it’s cool that mine was striped.

If I had a banded pipefish as a hitchhiker I’d be the best aquarist in the world lol.

 

[Slapp]

This? whatever it is?

Ruler worm?

Okay, I don't know the identity of this worm yet, but it's too interesting not to post a picture, and perhaps someone out there can help wit...

bodegahead.blogspot.com

I don’t think it was this because my worm had a more gradual taper to a very thin tail. This has a quick taper off. Additionally, the stripes are not solid but I think made up of debris the worm has eaten. They move and bubble when looked at up close.