Simply so, how does a seal move?
True seals do not move very efficiently on land — they undulate along the ground, extending their head and shoulders forward and then drawing their pelvis forward, with a motion rather like that of a caterpillar. They frequently use their fore flippers to help, so their tracks are easily seen on a sandy beach.
Moreover, what do elephant seals like to do?
Southern elephant seals feed exclusively at sea. The main sources of food are fish and squid. Prey is captured both near the surface and very deep underwater. The seals have been known to eat bottom dwelling fish from the ocean's darkest depths.
While swimming, southern elephant seals move at speeds around 5 - 10 kph (3 - 6 mph).