I have no idea what this is but there were lots of them on Chesterman Beach near Tofino – they move about by floating on the waves and land on the shore as the tide ebbs. I picked it up on a shell in case they are stingy things like jelly beasts.
As it turns out, these are Velella – “by the wind sailors” They’re Cnidarians and wash up on the shore in huge numbers occasionally…