Fifth and sixth fact
A 30,000 square mile “curtain of death” now exists off the coast of southern Africa. In 2006, a biomass of 13 million jellyfish far exceeded the 3.9 million tons of fish.Jellyfish have been around since about 550 million years ago. As indeed “survivors of an earlier, less hospitable world,” they can thrive in conditions that other species would find challenging or deathly. For instance, thanks to having a low metabolic rate, their oxygen requirements are low.
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