The animals are not aliens, but giant pile worms, large marine worms that are typically found on the seafloor, but will swarm ...

This deep-sea polar worm looks like it can't decide if it's dressed for a glitzy party or a gruesome massacre.

But some giant piling worms are found around deep-sea hydrothermal vents. “When these worms were first discovered, it was amazing. They were huge, about one metre (3 feet) long. When we ...