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Ambulocetus meaning "walking whale" was the first aquatic cetacean. It may have been a nimble swimmer like an Otter but it was a deadly ambush like a Crocodile with an appearance to match.

Ambulocetus meaning "walking whale" was the first aquatic cetacean. It may have been a nimble swimmer like an Otter but it was a deadly ambush like a Crocodile with an appearance to match.