Humpback whales typically feed on bait fish by lunging, either vertically or horizontally, through large schools. They can take in thousands of fish in one gulp.

Seals feeding on fish does not decrease fish stocks of Baltic cod, herring and sprat the most -- climate change, nutrient load and fisheries do, shows a new study. Skip to main content.

Because this is also where the seals feed, seals whose foraging success is tracked can provide a previously impossible way to measure the availability of fish populations across a vast ocean.

Typically, seals eat fish and mollusks, though some southern seals, like crabeater seals (Lobodon carcinophaga), are honed eaters of krill, another type of small crustacean.