Salt. There maybe some obscure breed of penguin I am not thinking of that lives in fresh, but most of the ones you see in zoos and tv are salt.
Penguins can't live in freshwater because they need salt to live
they prefer cold water. they can swim in warm water but not hot
It is too cold where the penguins live sharks only live in in the ocean not in ice cold water.
the main learned behavior of a pengiun is when baby penguins learn how to swim in the warm or cold water.
Penguins swim and fish in the sea so they swim in salt water
It can swim only in the winter.
swim in there water
Penguins have a fat in the called blubber. Blubber keeps penguins warm. When penguins swim their muscles release heat.
because the polar bears live there to get there water and foodbecause penguins and they like to swim in cold water
They move in the water like birds move in the air, a sort of flying through the water.
ether just swim or catch fish
Yes, the help them swim by pushing the water behind them
Any of the species of Penguins.
Not permently, Penguins live on land and swim in salt water to catch food.