Can I eat crustaceans?

Crustaceans are eaten by many people the world over and are considered a delicacy.  Lobsters, crabs, and shrimp are the most well known crustaceans to be enjoyed for human consumption and the crustacean food industry brings in millions of dollars every year.  It is advisable to only eat well known species of crustaceans, especially crabs, as some in the Indo-Pacific region are known to be poisonous.