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Large whales such as the baleen whales, (Humpback, Blue Whales, etc.) feed on krill, which in turn feed on algae. Say these whales were to become extinct, then there would be a large population of krill. All the krill would eat the algae, and may cause starvation for other animals. Also, algae in the ocean provides most of our oxygen, so this in turn can cause problems for humanity.

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16y ago

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