Is A Crab A Fish?

A crab is not a fish and they are not the same biologically. While crabs are part of the arthropod phylum, fish belong to the chordate phylum. Despite the fact that both are popular food items, crabs are recognizable by their hard exterior shell, segmented body, and legs with joints, whereas fish are known for their fins and gills.

Are all crustaceans considered to be crabs?

Crabs are a type of crustacean, but crustaceans include a variety of other species such as lobsters, shrimp, krill, barnacles, and others. They share the same features, such as a hard exoskeleton, jointed legs, and a segmented body.

How do crabs breathe?

Crabs breathe by utilizing their gills, which serve as specialized organs to extract oxygen from water. Unlike fish, some species of crabs have the ability to survive on land for extended periods of time, provided their gills remain moist. This allows them to stay out of water for over 24 hours.


Crabs are both an extraordinary species and a mouthwatering type of seafood. They do not only stimulate the palate, but they also play a significant role in the ecosystem. Their unique features and importance make it apparent why they are considered a true marvel of nature, capturing the attention of all ocean enthusiasts.