Whales and dolphins

Some whales can live many years. For example, did you know that blue whales can live 90 years? Maybe you already know that blue whale is the biggest animal in the world. This animal can reach 20 to 30 meters and weighs 100,000 to 180,000 kilos. But there's another whale that can live more years. They eat krill, they eat more 40 million a day! Whales of Greenland can live 100 years. Whale of Greenland reaches about 20 meters and weighs 100,000 kilos. Black whales can live 70 years. They can reach 13 to 17 meters and they weigh 90,000 kilos. The most whales can live up to 50 years and they usually eat marine invertebrates and plankton.

Let's talk about dolphins. Bottlenose dolphins can live 50 years, they reach 2 to 4 meters and they weigh 500 kilos. Common dolphins can live only 20 years, they reach 2.3 to 2,6 meters and they weigh only 80 kilos. Dolphins of Amazon can live 30 years. They can reach 2 to 2.6 meters and they weigh 100 to 160 kilos. All dolphins are friendly to the people and they usually eat fish and squids or smaller sea animals.

Scientific names:

Blue whale: Balaenoptera musculus

Whale of Greenland: Balaena mysticetus

Black whale: Eubalaena glacialis

Bottlenose dolphin: Tursiops truncatus

Common dolphin: Delphinus delphis

Dolphin of Amazon: Inia geoffrensis