Changes

The term whale refers to all [[Cetacean|Cetaceans]] that are not [[dolphin|dolphins]] or [[Poprpoise|porpoises]] or more informally to only the very largest [[Cetacean|Cetaceans]]. Although whales are famed for the massive size reached by some species, like the largest animal to ever live the [[Blue Whale]], others are relatively small like the pygmy right whale which grows to about 20 feet <ref>  [http://www.acsonline.org/factpack/PygmyRightWhale.htm]American Cetacean Society website</ref>.  Though whales have  many traits in common with fish (including fins and tails) they are in fact [[mammal|mammals]] and accordingly breath air and lactate. Whales have a number of remarkable [[adaptation|adaptations]] including:

The term whale refers to all [[Cetacean|Cetaceans]] that are not [[dolphin|dolphins]] or [[Porpoise|porpoises]] or more informally to only the very largest [[Cetacean|Cetaceans]]. Although whales are famed for the massive size reached by some species, like the largest animal to ever live the [[Blue Whale]], others are relatively small like the pygmy right whale which grows to about 20 feet <ref>  [http://www.acsonline.org/factpack/PygmyRightWhale.htm]American Cetacean Society website</ref>.  Though whales have  many traits in common with fish (including fins and tails) they are in fact [[mammal|mammals]] and accordingly breath air and lactate. Whales have a number of remarkable [[adaptation|adaptations]] including:

* they decide when to breathe, rather than breathing unconsciously

* they decide when to breathe, rather than breathing unconsciously