Lancelet in live sand?

[DrV4n]

A few various sizes of these curious and very energetic, wriggly guys came in my live sand today and I was able to grab a couple with tweezers and throw them in a bucket. Was tough to focus the video, looks to me like it might be lancelets. Could anyone confirm?
https://tbsaltwater.com/hitchhikers/lancelets-amphioxus-branchiostoma-floridae/

 

[Dread Pirate Dave]

That does seem to fit their description. :)

Another video.

 

[DrV4n]

That does seem to fit their description. :)

Another video.

Great video find, yeah looks like the same thing