Penguins are black and white. They live in the South Pole, sometimes on the ice and sometimes in the water. They like cold, snowy places. They eat a lot of fish every day.
They're birds but they can't fly. They're in danger because ships drop oil in their waters.
Giant dolphins are gray. They live in the sea. There are 32 or 33 species in the world. They eat fish and squid. In Argentina you can see dolphins in Mundo Marino. They are very intelligent. They are 2.50 metres long and they weigh about 75 kilos.