If you love the ocean, then you most likely are familiar with dolphins. These mammals reside in the sea waters, and there is estimated to be approximately 40 species of this mammal in the world. Dolphins are colorful and beautiful creatures and vary greatly in size. Dolphins are thought to have come into existence around ten million years ago. A dolphin tattoo is a popular one. This is said to be because of the close relationship between this species and humanity. Another reason many people may choose this tattoo design is because of the beauty it offers. Sailors frequently requested a dolphin tattoo because of this marine animal was thought to bring protection and guidance to all of the crew onboard a ship. If you love the dolphin, consider getting one of the world's most intelligent creatures.