The cave dwellers

I don't know about you, dear reader, but I think I could quite happily live in a cave by the sea.

Actually, I'm writing a poem based around such a premise. It's about a group of individuals who live in a cave by the sea. Cut off from civilization, they (eventually) turn into summat that's not quite, what we think of, as human (or at least their ancestors do).
It's entitled, 'The Cave Dwellers' and it goes something like this:

Wind-blasted, salt-sifted weathered skin.
Lean, straight-backed somewhat hirsute figures
Hard-grafted muscles and bone:
Running, climbing, swimming,
hunting, gathering, fishing - days spent
sharing, caring, laughing, playing - just living.
No death. No fear of death.
No regrets in ending, but rejoice in new beginnings.
Back to mother to replenish our beloved giving earth.
Home crafted in glistening rock
The cave dwellers inhabit some other place.​

[nice start but I suspect this poem will not end well]