No, whales are not herbivores, they are carnivores. Although whales do not eat the same meats as land animals they are known to consume fish, squid, octopus and other types of foods that are considered carnivorous foods. read more
The toothed whales are carnivorous, and the baleen whales strain tiny animals and plants from the ocean. Since the baleen whales eat both the tiny plants and animals, they probably aren't herbivores.. read more
The Blue Whale's diet consists almost entirely of Krill, which is a small sea crustacean. It will also occasionally consume small fish and sometimes even Squid. read more