Why art thou cast down, O my soul? Psalm 42

Down from twilight into dark at noon,
through darker, down until the black
could not be more devoid of star
or sunlight, o my soul, near freezing
in sub-photic stillness past
the fragile strands of glowing jelly
radiant with tentacles to sting,
and bioluminescent lures of anglers,
down where water beading on the cold hatch
overhead has sheathed in dewdrops
the titanium, past dragonfish
with nightlights set into their heads
and flanks, past unlit cruisers,
blackcod, owl fish, eelpout, skate,
where spider crabs, arms long as mine,
on creamy prongs drift floodlit
over the pillow lava, here,
our craft has taken us where no one
could have come till now but corpses.