| Nota de contenido: | Sea lions of the north
Sea lions of the south
Fur seals
Walrus
Antartic seals
Monk seals
Elephant and hooded seals
External shape and locomotion
Skin, fur, moult, temperature
Skull and skeleton
Dentition and age determination
Alimentary canal, liver, kidney
Respiratory system
Vascular system
Reproductive organs
Brain and nervous system
Senses
Diving
Fossils
List of parasites
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