Facts about dolphins

1. Dolphins have to be conscious to breath. This means that they cannot go into a full deep sleep, because then they would suffocate. Dolphins have "solved" that by letting one half of their brain sleep at a time.

2. On average an adult dolphin will eat 4-9% of its body weight in fish, so a 250 kg (550 lb) dolphin will eat 10-22.5 kg (22-50 lb) fish per day.

3. The average lifespan of a dolphin is approximately twenty years.

4. There are 67 total species of dolphins 32 of them oceani,c with River dolphins, Sperm whales, Beaked whales, Beluga, Narwhal and Porpoises rounding out the other 35 species.

5. Porpoises are often confused with dolphins, but while dolphins have rounded interlocking teeth, porpoise teeth are squared.

6. Dolphins have an acute sense of hearing and eyesight.

7. Dolphins live in groups called pods.

8. A newborn baby dolphin will surface from the water to take its first breath.

9. The orca or killer whale is the largest species of dolphins.

10. Dolphins are warm blooded animals.