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Adult seals have quite the appetite.
They are known to feast on squid, crustaceans, molluscs, and a variety of fish; including, rockfish, herring, flounder, salmon, hake, and sand lance.
A seal's diet also tends to vary seasonally and regionally and often is subject to local prey availability.
They eat a great deal of food each day so it can take them many hours to feed each day.
The orca, or killer whale, is one of their major predators, and so are the larger shark species, especially the great white shark. Polar bears are another major seal predator. In arctic waters, polar bears stalk seals on large ice floes.