Edible Crab

Overview

The Edible Crab (Cancer pagurus), also known as the brown crab, is a robust, large-bodied crustacean widely distributed across the North Sea, the North Atlantic, and parts of the Mediterranean. It is highly valued in European fisheries and is easily recognized by its distinctive reddish-brown, oval-shaped shell and powerful, black-tipped claws.

Distribution & habitat

This species is found from the intertidal zone down to depths of approximately 100 meters. It inhabits a variety of substrates, including rocky reefs, boulders, and coarse sediments like sand or mud. Adults often show gender-specific preferences, with males frequently favoring rocky areas while females often prefer softer, sandy or gravelly seabeds.

Appearance

The Edible Crab is characterized by a broad, oval carapace with a unique, crimped front edge that resembles a pie crust. While adults are typically reddish-brown, juveniles may appear more purple-brown. They possess two large, powerful claws with black tips, one often adapted for crushing and the other for cutting.

Biology & behavior

These crabs are primarily nocturnal, spending their days hidden in rock crevices or buried in the substrate to avoid predators like octopuses. They are active predators and scavengers that emerge at night to forage. As they grow, they must periodically moult their hard exoskeleton, a process that leaves them vulnerable until their new shell hardens.

Feeding

As opportunistic omnivores, they feed on a range of prey including molluscs, crustaceans, and echinoderms. They are known to be voracious predators of mussels and will also scavenge carrion found on the seafloor.

Reproduction

Mating typically occurs in spring and summer following the female's moult. Males often engage in "mate guarding," protecting the female for several days before and after copulation. Females store sperm to fertilize their eggs, which they carry under their abdomen for several months.