This is the Porpita porpita (Blue Button).
These guys are not just one critter but a whole colony!
The original polyp is anchored to a solid substrate and forms a bud which remains attached to its parent.
https://video.nostr.build/0f51d332754a0a1750d221dd3d174a9df13a04338c80b4e1d2509d6d4dd08502.mp4
This in turn buds and in this way a stem is formed.
The arrangement of polyps and the branching of the stem is characteristic of the species.
The Blue Button looks like a jelly but is not infact a jellyfish, it is actually a chondrophore which are closely related to siphonophores (includes Portuguese man o' war).
These guys are found drifting on the surface of the ocean looking very pretty!
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