A crab with 9-foot long claws arrives at Blackpool Sea Life Center. An absolutely massive, Japanese spider crab was taken to his new home at Blackpool Sea Life Center. With a 9-foot long claw span, he is being referred to as Britain s biggest crab. Named Big Daddy , he seems to enjoy his new residence. A supervisor at the center, Scott Blacker, states He s in the tank and looking happy so that s quite cool.'