Seafood are gently good especially fish.  Omega 3 in fish is the highlight in any culture.  Fish are popular in the Cantonese culture.  There are abundance of them and they are easy to cook and it is also non fattening with health value. 

Other seafoods are also great, but not highly regarded in nutritional value.  I love the crabs, but like most people, shelled seafood requires effort.  Are you willing to work for your seafood?