In the ocean after dark, divers see things not observed by day. Scrawled filefish doze in mid-water. Baby spadefish reel drunkenly in their sleep. Reef cuttlefish and octopus hunt in the night. Parrotfish slumber in cocoons of mucus.
Sea urchins emerge from their rocky lairs to feed.
And sea cucumbers munch their way across the sandy floor. A squarespot basslet. The white square looks blue underwater. Too soon our life support systems showed that air was running low. We moved back up the crevice to the basin where we entered.