Drift nets meant for fish catch anything that goes by, including dolphins, sharks, sea turtles, seals, seabirds, and other marine life. Pollutants also collect (by a process called biomagnification) in the blubber of these marine mammals and many are also hunted by humans. Seals and sea otters are still sought after for their pelts in some places. Sirenians are exploited for their meat, which apparently tastes like veal, and for their skin and oil-rich blubber.