blue whales can live for up to ninety years.They travel all over the world, usually in pairs or small groups.As they swim,they talk to each other singing. Their songs can be heard of 1200 kilometers away in the summer they live in the sea near the North and South Poles.In the winter they swim to warmer water.Their babies and born in the warmer water in the winter.When the babies are born,they are already 8 metres long But although these large animals are so big,many people see them.There is a lot of sea to hide in