Wanderlust World Wanderlust World The Atlantic Ocean hosts one of Earth's most complex marine food webs. From microscopic plankton to apex predators, energy flows through countless interactions. Here are five representative predator-prey pairs shaping Atlantic ecosystems.
Predators: Great white, tiger, bull, blue, and mako sharks.
Prey: Tuna, mackerel, sardines, herring, menhaden.
Role: Apex control of mid-trophic populations; scavengers on carrion.
Predators: Common dolphin, bottlenose dolphin, harbor porpoise.
Prey: Herring, mackerel, sand lance, squid.
Role: Highly mobile, cooperative hunters; indicators of ecosystem health.
Predators: Blue, fin, humpback, right, and minke whales.
Prey: Antarctic krill (Euphausia superba), Calanus copepods, small fish.
Role: "Biological pumps"—transport nutrients vertically via feeding and fecal plumes.
Predators: Longfin inshore squid, Humboldt squid, giant squid.
Prey: Lanternfish, juvenile tuna, shrimp, other squid.
Role: Key mid-trophic link; major prey for sperm whales, sharks, seabirds.
Predators: Northern gannet, Arctic tern, sooty shearwater, frigatebird.
Prey: Sand lance, capelin, flying fish, squid.
Role: Transfer marine nutrients to land via guano; sensitive to forage-fish depletion.
Disrupt one link—say, overfishing herring—and effects cascade: puffin chicks starve, tuna move offshore, whale migrations shift. Sustainable fisheries management and climate adaptation depend on understanding this web, not just single species.