The second possibility is that (the) Seabrainiac is sole member of a phylum, class, order, family, genus and species, resembling a sea slug that has developed leglike appendages, essentially bags of muscle and water, whose shape is maintained by hydrostatic pressure. Possessed of only a rudimentary nervous system, this possible Seabrainiac is nonetheless far and away the intellectually superior inhabitant of the abyssal plain. Its cautious and nervous nature are apparent in its movements, thus:
Now, under the surface of the world's oceans, there are many strange and wonderful things, as often as has been possible reduced to readily simulated comprehension by naming them for various things familiar from our existence on our little part of the planet's surface: seahorses, seafans, seabiscuits, seawolves, seapens, and so on. Yes, seabiscuits, relatives of sand dollars and oh yes, sea urchins, the orphaned, wandering children of the deep.
Or, finally, perhaps the SEABRAINIAC is a highly intelligent form of sponge, brainless, without a determinate physical structure, and filled with siliceous spicules. It may have evolved from, or been created by, the seabrains, a much less intelligent form. As such, it is doomed to forming its intricate constructs of cogitation without perception, without expression, without communication, in the silent wash of the waves. Some few scientists are even now struggling to develop means of decoding and comprehending the thoughts of the SEABRAINIAC. Others scoff at their theories.
That related, it is also a nexus where you may view artworks that are intended, by way of appreciation for physical and artistic beauty, and by way of a process of intellectual assembly to the point of saturation, intended as opportunities for a kind of flight. Or call it travel.