Seals are marine animals and belong to mammals (viviparous). Their bodies are streamlined and their limbs become fins, which is suitable for swimming. Seals are all spindle-shaped and suitable for swimming. Their heads are round and look like domestic dogs. They are all hairy and their forelimbs are shorter than their hind limbs.
Seals live in cold temperate waters, and spend the rest of their time swimming, foraging or playing in the sea except when they need to go to the ice, beach or rocks during spawning, rest and molting.
Species of seals
There are 18 species of seals in the world, 7 species in the Arctic and 4 species in the Antarctic. But there are not as many seals in the Arctic as in the Antarctic. All seals in the world are spindle-shaped and suitable for swimming. Their heads are round and look like domestic dogs.
At present, there are many kinds of seals in the world's oceans, including 13 genus and 18 species. Antarctica has the largest number, followed by the Arctic Ocean, the North Atlantic Ocean and the North Pacific Ocean. From small to large, they are striped seals, ringed seals, spotted seals, Ross Sea seals, saddle seals, gray seals, crested seals, crab-eating seals, bearded seals, Weddell seals, monk seals, leopard seals and pictographic seals.