Habitat
Crabs are found in freshwater and marine waters all over the world. They do favor the tropical and semi tropical areas though. They live in water and on land and can vary in size from a few millimeters in size like the pea crab to a few meters in size like the Japanese spider crab (4 m leg span). Lobsters live at the muddy and sandy bottoms of seas and oceans. The largest lobster caught (Nova Scotia, Canada) weighed 20.15 kilograms.