Life in the World's Oceans. Episode 8, An Overview of Marine VertebratesLife in the World's Oceans. Episode 8, An Overview of Marine Vertebrates

Mammals are certainly represented in ocean life, but which species should be identified as "marine" when considering ocean productivity? The extremely complex marine food webs maintain long-term stability, even as they undergo natural perturbations over time. But when Homo sapiens enters as an apex predator, productivity…