The Greater Spiny Crab (Maja brachydactyla) is a marine (saltwater) crustacean in the Majidae family of crabs. It is a majid crab. It is also called a Sea Spider.
The Greater Spider Crab is almost triangular in shape with an olive-khaki-green exo-skeleton (shell) called a carapace. The carapace is covered in spines called tubercles. It has 10 orange legs.
The Greater Spider Crab walks forward – unlike most crabs that walk sideways.
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