LOS ANGELES — An animal rights group has called on one of the largest aquariums in the United States to stop serving fish to its visitors, likening the practice to grilling up "poodle burgers at a dog show." "It's easy to think of fish as swimming vegetables but of all the places in the country where fish should get a fair shake it's an aquarium," said Karin Robertson, manager of the Fish Empathy Project for People for the Ethical Treatment of Animals. Robertson Friday sent a letter to the Aquarium of the Pacific in Long Beach, near Los Angeles, asking...