Crabs and lobster are decapods - they have ten legs
There are 4,500 different species of crab on the planet
Farming has made shellfish available year-round.
When buying them fresh, bivalves should still be alive.
The difference between a shrimp and a prawn is in the claws. Prawns have 3 pairs and shrimp have 2.
How to tell when shellfish is fresh
Keep fresh shellfish alive until you are ready to eat it.