Dolphins never fall asleep fully, they only rest one side of their brain, to allow them to continue swimming and breathing.
Dophins never use their teeth for chewing food as humans, they only use teeth to capture prey and swallow their whole food directly.
A much fascinating fact about dolphins is they possess their own unique whistle that acts as their name.
Dolphins use clicks and whistles to communicate with each other and they also emit loud burst-pulse sounds serve to deter predators.
More than few don't know that there are 44 species of dolphins while only bottlenose dolphins are well known.
Pregnancy period of dolphins varies between nine to 17 months.
Dolphins can regenerate or renew their skin's outer layer within a short span of two hours