What is troll crab?

As an AI language model, I don't have the ability to access up-to-date information since my training data only goes up until October 2021. However, here's what I can tell you about troll crabs:

Troll crabs are a species of deep-sea crab found in the waters around Antarctica. They are part of the family Nephropidae, which includes lobsters and other types of crabs. The troll crab has long legs, a spiny carapace, and large claws. They are known for their camouflage, which helps them blend into their surroundings, making them difficult to spot by predators.

Troll crabs are typically found in very cold waters, and they are able to survive at depths of up to 2,000 meters (6,500 feet). They feed on a variety of marine animals, including fish, squid, and other crustaceans. Despite their name, troll crabs are not known to be aggressive towards humans, and are primarily caught by commercial fishermen using traps.