We hear about the problem with charismatic land species. It's those species that either have a powerful personality or a cute face that endear people to them and garner news attention. Examples include panda bears, wolves, elephants, tigers, etc. It's easier to motivate people to save them as opposed to other species that are vital, but either boring or ugly.
It's the same problem with marine life. People want to save the dolphins and the sea otters, but what about the bluefin tuna? Or cod? They don't invoke the pathos of the tragic salmon or the merriment of a playful porpoise.
So what happens to them?