We observed this crinoid growing on the rather tall stalk of a glass sponge during Dive 07 of the second Voyage to the Ridge 2022 expedition at a depth of 3,241 meters (2.01 miles).
Crinoid Growing On Glass Sponge
Image courtesy of NOAA Ocean Exploration, Voyage to the Ridge 2022. Download larger version (jpg, 1.2 MB).

We observed this crinoid growing on the rather tall stalk of a glass sponge during Dive 07 of the second Voyage to the Ridge 2022 expedition at a depth of 3,241 meters (2.01 miles).