Henricia Sea Star (tentative ID)
This species is also fairly common, often seen lounging on the basaltic lavas of Axial. They have long, slender arms and a relatively small central disk.
They have been tentatively identified as a Henricia species (or possibly a pedicellasterid) by Chris Mah, of the Smithsonian National Museum of Natural History.
References:
https://echinoblog.blogspot.com/search?q=henricia
https://en.wikipedia.org/wiki/Henricia