Discovering the Fascinating World of Dolphins

The video explores the fascinating world of dolphins, detailing their species, physiology, and abilities. Dolphins are oceanic mammals known for their intelligence and social behavior. They have unique physiological traits, such as separate orifices for breathing and eating, and two stomachs for digestion. Dolphins are skilled divers and swimmers, capable of reaching significant depths and speeds. They exhibit altruistic behavior, helping injured peers, and communicate through echolocation and individual whistles. Despite their delicate skin, dolphins heal quickly. Conservation efforts are crucial as several species face threats from pollution and hunting.

What distinguishes oceanic dolphins from river dolphins?

• Their size

• Their habitat

• Their diet

• Their color

How do dolphins prevent water from entering their lungs while hunting?

• By closing their mouths

• By holding their breath

• By using their blowholes

• By swimming backwards

What is the maximum speed dolphins can reach when necessary?

• 25 mph

• 18 mph

• 12 mph

• 7 mph

Which sense is particularly well-developed in dolphins?

• Taste

• Echolocation

• Hearing

• Vision

How do dolphins manage to breathe while they are asleep?

• One part of their brain stays awake

• They use gills

• They breathe through their skin

• They stop breathing

What is a notable feature of dolphins' skin?

• It is very thick

• It heals quickly

• It is waterproof

• It changes color

Which dolphin species was declared functionally extinct in 2006?

• Irrawaddy river dolphin

• Pink dolphin

• Ganges river dolphin

• Yangtze river dolphin