Guardian: If you think that protecting wildlife, especially the big, sexy creatures, is a worthy thing to do but has little to with the lives of people, consider the case of the manta ray. A trade in their gills worth just $5-10m a year is devastating their populations which, in the places where it is developed, supports a tourist trade worth well over $100m a year.
It is not hard to see why tourists will pay to see them. They are extraordinary creatures, up to 7m in wingspan, living for 50 years and unafraid…