Umi lily drags long body, walking with arm
Spinach (Kyakuhi) Animal larva is a movie walking with arms while dragging a stalky body. It seems that the name is similar to the plant lily, so it was named, but it is a proper animal.
The playback of the movie is from the following.
Walking Umi lily.
YouTube - Crinoid Sea Lily Crawls!
Sweet Lily Lily.
YouTube - Yuri Yuri
Umi lily is the same spinach animal as starfish, sea urchin and sea cucumber, it seems to catch the food floating in the sea using the arm elongated like a petal.
Echinoderms - Wikipedia