MARINE LIFE DURING THE NEOGENE PERIOD
Although prehistoric whales started to evolve in the preceding Paleogene period, they didn't become exclusively marine creatures until the Neogene, which also witnessed the continuing evolution of the first pinnipeds (the mammalian family that includes seals and walruses) as well as prehistoric dolphins. Prehistoric sharks maintained their status at the top of the marine food chain; Megalodon, for example, had already appeared at the end of the Paleogene, and continued its dominance throughout the Neogene as well.
Although prehistoric whales started to evolve in the preceding Paleogene period, they didn't become exclusively marine creatures until the Neogene, which also witnessed the continuing evolution of the first pinnipeds (the mammalian family that includes seals and walruses) as well as prehistoric dolphins. Prehistoric sharks maintained their status at the top of the marine food chain; Megalodon, for example, had already appeared at the end of the Paleogene, and continued its dominance throughout the Neogene as well.
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