1. Dolphins Recognize and Admire Themselves in Mirrors.
  2. There are 40 extant species of dolphins.
  3. Dolphins have the longest memory in the animal kingdom.
  4. The U.S. Navy has 75 trained dolphins to detect enemy swimmers and underwater mines.
  5. The average lifespan of a dolphin is 15 years. However, some of them lived 50 years.
  6. Dolphins sleep with one eye open.
  7. Only one-half of a dolphin's brain goes to sleep at a time.
  8. Dolphins can communicate with one another over a telephone, and appear to know who they are talking to.
  9. Dolphins and whales give birth
    with the tail first instead of the head.
  10. Male dolphins are called "bulls", and females "cows".
  11. A 2-headed dolphin was discovered on a beach in Turkey in 2014.
  12. Killer Whales are actually dolphins, not whales.
  13. Dolphin copulation happens belly to belly.
  14. Dolphins give each other names and will answer to it even when called by dolphins they don't know.
  15. The wolphin is the result of the union of a bottlenose dolphin and a false killer whale.
  16. Dolphin meat is consumed in Japan and Peru.
  17. Infanticide has been observed in bottlenose dolphins.
  18. There are albino bottlenose dolphins.
  19. Dolphins and whales squeal
    to express delight.
  20. In 2014, a deceased two-headed dolphin was discovered washing up on shore in the waters off Turkey's west coast.
  21. A bottlenose dolphin may use its tail flukes to flip a fish out of the water, and then retrieve the stunned prey.
  22. A dolphin's stomach is compartmentalized for rapid digestion.
  23. Some offshore dolphins were found with deep-sea fishes in their stomachs. This evidence suggests that offshore dolphins may dive to more than 500 m (1,600 ft).
  24. A study indicates that dolphins talk to each other in sentences.
  25. Dolphins shed the top layer of their skin every two hours.
  26. Dolphins trained to kill for the Soviet navy were sold to Iran because they could no longer afford to feed it.
  27. Dolphins intentionally chew on toxic pufferfish to get high.
  28. Dolphins go on killing sprees when they're sexually frustrated.
  29. Dolphins tenderise octopuses by bashing them around before eating them.
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