"Spider Crab Secrets" - Click on the video for the full view 💙 Did you know that the spider crab is the UK's largest crab with their legs growing up to 80 cms long and their shell up to 29 cms across? They love a good munch on small fish, seaweed, mussels and even starfish and even jellyfish. You'll often see seaweed and other shells growing on them which are used as camouflage. As they grow, they shed their old shell and will hide until their new ones harden. Very often you'll find pieces of t