Genus Macrocheira is a taxonomic classification given to the largest known crab species. Synonyms for Genus Macrocheira include the Japanese spider crab and the tall-footed crab. The Japanese spider crab is known for its long legs which can span up to 3 meters in length. This species is found in the waters around Japan and is a prized delicacy in Japanese cuisine. The tall-footed crab, also known as the giant spider crab, is found in the waters around Taiwan and the Philippines. This species is known for its distinct appearance and has been a subject of fascination for scientists and food enthusiasts alike. Despite being called a "crab," both the Japanese spider crab and the tall-footed crab are more closely related to lobsters.