Goose Barnacle

Great photos.. I have moved it to Arthropods..

Thank you OnengDyah for Fav.

Thanks martini for informative comment.

Thanks for the images, pmbagga. These pelargic (living in open oceans) barnacles are commonly found on driftwood or other flotsam, as in this case, a cuttlefish bone. Washing up onto the coast is an occupational hazard and sadly is fatal for them.

Thanks martinl for ID.