Survival Strategies

Deep-sea life has evolved striking adaptations to handle darkness, pressure, and scarce food:

• Giant eyes — many fish have huge eyes to catch every faint flicker of bioluminescent light
• Expandable stomachs — the black swallower can eat prey more than twice its own length
• Slow metabolism — the Greenland shark grows about one centimeter per year and can live over 400 years
• Transparent bodies — glass octopuses vanish into the featureless water

Each trait answers one brutal reality: down here, energy is precious, and wasting it means death.