The blue whale is part of the family of the baleen whales which also include the right whale and the humpback whale. An interesting fact about the blue whale is that if it was a land animal its body weight would crush it. This is because the blue whale does not have the support of large bones to hold its body weight. The blue whale is the biggest animal on earth and this is possible because of the large store of food that is available to the blue whale in its natural habitat of the ocean. In addition to being the largest creature on earth the blue whale is also the loudest and can generate low frequency sounds that travel very long distances through the waters the blue whale inhabits. This is important for blue whales to communicate with each other in the water. In addition to this other characteristics of the blue whale that are interesting are its streamlined shape and the unusual blow holes that it has. The body of the blue whale is almost U shaped and it includes a ridge that extends from the blow holes of the body to the tip of its snout. In regards to the blow holes the whale has, these are contained in a sort of splash guard making them well protected. This is an addition that the blue whale has that is different than many whales. In addition to this the blue whales body is often almost completely free of parasites though a small amount of barnacles usually attach themselves to the whale’s fins and fluke.
This whale is called blue but in actuality it is often bluish gray in color and may be even closer to gray than blue in most cases. The belly of the whale is often yellowish green because of the microorganisms that attach themselves to the underside of the whale. These micro organisms are referred to as diatoms and they come from the cold waters that blue whales often travel to. This yellowish green caste is responsible for the name sulfur bottom which is a name that many whalers call this particular whale.