Seals are streamlined to reduce the friction between it and the water around it, this allows the seal to dive. Streamlining also allows the seal to move faster through the water and change direction quickly to escape from predators or to hunt prey.
They were seals.
Seals typically have around 200 bones, similar to other mammals. However, the exact number can vary slightly between different species of seals due to variations in size and skeletal structure. Their bones are adapted to support their aquatic lifestyle, with modifications that enhance buoyancy and streamline their bodies for swimming.
So they can swim faster (;
Seals evolved these features to become more hydrodynamic.
Blubber is fat. THeir bodies will make it, just like our bodies, if they get enough to eat.
Animals like octopus , squid andstarfish have streamline bodies.
by the fat on the bodies and food and water
To make them more streamlined for faster swimming.
Since penguins cannot fly, they have adapted to have streamline bodies to swim in their environment.
Seals have a thick layer of fat around their bodies, plus oily, waterproof fur to help insulate them.
Whales and Seals have a layer of fat under their skins which act as an insulator/prevent heat loss from their bodies
They kill seals because of their fur and some times because of their meat. Some people kill them and use all part of their bodies though