On a rocky outcrop almost 2 miles beneath the surface of the Pacific Ocean off Costa Rica, researchers have documented an active octopus nursery
. It may be the third known example of a brooding site where huge numbers of the creatures cluster together. During a three-week expedition this month, scientists on board Schmidt Ocean Institute’s Falkor research ship saw hundreds of octopuses and watched their babies hatch at the soccer field-size Dorado Outcrop. Located 2,800 meters deep in the lower reaches of the so-called twilight zone, it was one of six underwater mountains surveyed by the vessel’s underwater robot, ROV SuBastian.
“ The researchers also found one other smaller octopus nursery on a low-temperature hydrothermal vent on an as-yet-unnamed seamount. Possibly a new species The discoveries add to evidence that some species of deep-sea octopus may seek out low-temperature hydrothermal vents for brooding their eggs. The warmer fluids may provide an advantage to egg development, even if the lower oxygen would make it harder to breathe.
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