While operating the deep-sea robot nearly 7,000 feet below the surface, the machine’s camera captured a creature that appeared to be “all legs” walking across the seafloor, according to a March 18 Facebook post from the institute. “Huge spider alert! This is a pycnogonid,” researchers said in the post.

A calving iceberg exposed a region that never before had been seen by human eyes, revealing a vibrant, thriving ecosystem