There are more than 1000 types of sea urchins in the world, a specially sea urchins such as Japanese sea urchins , Canadian sea urchins , Chilean sea urchins , etc.

A King of Sea Urchins - Japanese Sea Urchins

Japanese sea urchins are highly respected by Hong Kong gourmets. Many verieties , fat and thick meat , taste is extremely sweet. 

Other types of sea urchins such as Canadian sea urchins and Chilean sea urchins have their own flavors. Canadian sea urchin have heavier and fishy taste ; while Chilean sea urchins have heavier taste of seawater , become more bitter and astringent which are more suitable for cooking.