Evolution, Taxonomy, Species Learn how dolphins came into being and how taxonomists classify the different species. Evolution Dolphins are mammals, and as such, evolved from terrestrial creatures. On this page you can find answers to such questions as: How and why did they reenter an aquatic existance millions of years ago? When did the numerous adaptations that help them to survive in the water develop? What were the first cetaceans like? Taxonomy Oceanic dolphins include at least 26 different species, and that's not counting river dolphins and the smaller, toothed whales that belong to the same family as dolphins. In this section, learn how taxonomists classify the many species of dolphins. Information on the characteristics of each species is included.

© 1998 Thinkquest Team 17963 <17963@advanced.org>: Bradford Hovinen, Onno Faber, Vincent Goh Modified: 21 August 1998, Created: 14 August 1998