According to Helen Scales, the ocean deep is far from the abyssal wasteland we think it is. As sperm whales plunge thousands of feet down to chase giant squid, exquisitely beautiful bioluminescent jellies sift through inky black water as deep sea octopuses, gigantic isopods and hairy-armed yeti crabs trundle along the undulating ocean bottom, inhabiting dark trenches and hydrothermal vents (purported to be the beginnings of all cellular life).