https://scholarspace.manoa.hawaii.edu/items/d9ef3f0c-6fff-463c-88c9-1a84c2810ccf
Notes. Two Sea Urchins Found inside the Air Bladder of the Bull Kelp (Nereocystis luetkeana)
While I was a scientific observer for the United States aboard a Japanese fishing vessel in the North Pacific Ocean, I observed two sea urchins living within...
https://digitalcollections.library.oregon.gov/nodes/view/309354
Dynamics of the kelp Nereocystis luetkeana community, and impacts of harvesting on the community....
of thedynamicskelp