(London Guardian) Descending in a submersible in waters off Panama, scientists noticed something strange happening near the seafloor. It was a drifting fog of sediment, disturbed by something below. Diving deeper, the scientists found the cause: crabs, thousands of them, swarming in a way never before recorded.
"We just saw this cloud but had no idea what was causing it," said Jesús Pineda, a biologist at Woods Hole Oceanographic Institution in Massachusetts and the lead author of a paper on the crabs published on Tuesday.
"At first, we thought they were biogenic rocks or structures. Once we saw them moving, swarming like insects, we couldn't believe it.
Advertisement - story continues below