There's actually no poisonous crabs although they may be poisonous to other sea creatures but not to humans.
If a crab were to bite you they would only hurt you with a wound and not kill you with venom.
There's no such thing as a venomous crab or lobster, prawn or shrimp.
There are some 70,000 species of crustaceans and, until recently, it seemed that all of them were venom-free.
Others noticed them eating other crustaceans in the wild.
Also crab lungs are not poisonous either but they are not digestible and not very tasty though so it's best to throw out the crab lungs.
An old wives' tale says crab lungs are toxic, but they're actually just not digestible and taste terrible.
Now scrape out the gooey stuff in the center of the crab's body's two equal solid parts.
The greenish stuff is the liver, called the tomalley.
You can eat it and many love this part of the crab.
The meat of the blue crab is considered by many to be the sweetest and best tasting of all crabs.
Soft-shell crabs are blue crabs that have shed their old shell to form a new one.
During this process, the crabs are without their hard covering for only a few days, and they're only truly soft-shells for a few hours.