Halloween Crab, Gecarcinus quandratus: The Haloween Crab is a very colorful decapod and member of the Gecarcinidae Family and is found primarily on land within mangrove, sand dunes and rainforests along the Pacific coast of Mexico.
Halloween Crabs are sold in the pet trade. They have large purple claws, reddish-orange legs and an almost entirely black shell, a pair of yellow, orange or maroon spots behind the eyes and an additional white spot on the lower central portion of the shell.
They normally measure up to 4 inches in width with a very smooth shell that has a central depression.
The eyes are on short stalks, near the center of the anterior margin of the carapace.
They are known for their nocturnal burrow digging which can extent up to 5 feet in length.
They spend much of their time on land but return to the ocean to breed.
Halloween Crabs are highly territorial.
They are largely herbivorous consuming leaf litter and seedlings. They have life spans of 10 to 15 years.