how do pinniped move from one place to another?
They have two pairs of flippers; the fore-flippers and hind-flippers, and smooth networks of muscle bundles in their skin that may increase laminar flow and make it easier for them to slip through water
Pinniped
Pinnipeds have two pairs of flippers on the front and back, the fore-flippers and hind-flippers. The elbows and ankles are enclosed within the body. Pinnipeds tend to be slower swimmers than cetaceans, typically cruising at compared to around for several species of dolphin. Seals are more agile and flexible, and some otariids, such as the California sea lion, are capable of bending their necks backwards far enough to reach their hind-flippers, allowing them to make dorsal turns. Pinnipeds have several adaptions for reducing drag. In addition to their streamlined bodies, they have smooth networks of muscle bundles in their skin that may increase laminar flow and make it easier for them to slip through water. 
what class of vertebrates do seals belong to Pinnipeds what are pinnipeds? Diverse clade of carnivorous, fin-footed, semiaquatic marine mammals. what is the diet of the the last kind of mammal you mentioned? All cetaceans are carnivorous and predatory what kind of threat do these mammals face? Due to the difficulty to survey populations, 38% of marine mammals are data deficient apart from the seal can you name some other animals that full under this type of mammals? Whales, manatees, sea otters and polar bears
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Pinniped [SEP] Locomotion
Pinnipeds have two pairs of flippers on the front and back, the fore-flippers and hind-flippers. The elbows and ankles are enclosed within the body. Pinnipeds tend to be slower swimmers than cetaceans, typically cruising at compared to around for several species of dolphin. Seals are more agile and flexible, and some otariids, such as the California sea lion, are capable of bending their necks backwards far enough to reach their hind-flippers, allowing them to make dorsal turns. Pinnipeds have several adaptions for reducing drag. In addition to their streamlined bodies, they have smooth networks of muscle bundles in their skin that may increase laminar flow and make it easier for them to slip through water.