Read that this is an animal, not jellyfish - siphonophore.
Several of these were all along the west shoreline on our hike to Bean Point.
Just noticed that my shadow is in the bubble.
Nikon Z 6II
,NIKKOR Z 70-200mm f/2.8 VR S with TC 2X 1/500s f/10.0 at 600mm iso180
UnCropped DX Image ReSized for Internet Viewing
full exif