Blue label on fish product

When we buy fish in supermarkets,we recently notice blue labels put on packages besides price tags.This system is originated in England that indicates that fish is made from more environment friendly process.There're more endangered species in the ocean because we take so much.So this label is expected to contribute as a precaution against destroying ecological circumstance of ocean.The only problem is the product with this label is slightly expensive that usual ones.I hope consumers will have more concern to make fish market sustainable.