### animal | vertebrate | mammal | whale:

Baleen whale
* All baleen whales have two blow holes.
* Most baleen whales exhibit skin color variations of black and gray
  - grow to feet
* Most baleen whales have jaws
  - plates
* Most baleen whales swim between two and four miles per hour when cruising
  - through the sea with mouths open
* Most baleen whales use frequency sound
  - low frequency sound
* Some baleen whales are coastal
  - feed on algas
* Some baleen whales have combs
  - roofs
* Some baleen whales suffer fate
  - same fate
* are among the biggest of the whales
  - cetaceans that filter-feed with baleen plates
  - essentailly filter feeders
* are filter feeders, obtaining krill by sieving water through their baleen
* are generally larger than toothed whales, and females are larger than males
  - solitary animals
  - huge filter feeders
  - largely monogamous within each reproductive period
* are larger than the toothed whales and have two blow holes
  - much larger than toothed whales
* are some of the largest animals on earth
  - the largest whales but they eat tiny food animals
* catch krill.
* continue to be harvested.
* eat krill and other plankton, which they strain from the water
  - that they sieve through their baleen
  - krill, zooplankton and small fish swarming in large schools
  - lots of small animals called krill
* eat mostly plankton
  - shrimp-like animals called krill, copepods. and small fish
* feed mostly on krill and small fish.
* feed on krill and plankton
  - plankton, drifting masses of tiny plants and animals
* give birth to a single calf.
* have a double blowhole, toothed whales have a single blowhole
  - moustache of whalebone attached to their upper jaw
  - relatively small brain compared to their body mass
  - small external ear opening on each side of the head
  - small, yet functional, vomeronasal organ
  - smooth skin surface with no oil glands or pores
* have baleen plates for filtering food from water, instead of having teeth
  - instead of teeth, which they use to filter small particles of food
  - big mouth but no teeth
  - bristles made of keratin instead of teeth
  - comb-like plates that hang from their upper jaw
  - huge mouths but small gullets, and they feed on small things
  - many plates of baleen in their mouths instead of teeth
* have no teeth unlike their closely related toothed friends killer and sperm whales
  - teeth, but they do have two blowholes
  - vocal cords
  - plates of baleen that hang from the upper jaw
  - sensitive skin, especially on the head and flukes
  - strainers in their mouthes to catch fish
  - symmetrical skulls
  - two and toothed whales have one
* have two blowholes side by side, and toothed whales have just one
  - which are located side by side
* have two blowholes, as opposed to toothed whales which have one
  - where toothed whales usually just have one
  - external blowholes and are larger in size than most toothed whales
  - flippers on the front, near the head
  - nostrils, or blowholes
* look a little off kilter, Just because they eat with a filter.
* produce a number of vocalizations , notably the songs of the humpback whale.
* push out the water through the baleens, straining the krill to be swallowed later on.
* seek out concentrations of small planktonic animals.
* strain huge amounts of plankton and small fishes through their baleen plates
  - plankton out of the water, whereas the toothed whales eat larger prey
* take in huge amounts of water and filter it out again through the baleen.
* tend to be solitary animals, traveling alone or in small groups
  - spend the summer in polar seas, where plankton blooms provide abundant food
* travel alone or in small pods.
* use baleen to strain food from the water
* use low frequency sound to communicate, sometimes over considerable distances
+ Mysticeti
  * The 'Mysticeti' The scientific name comes from the Greek word 'mystidos', which means 'unknowable'. The other being the Odontoceti, or toothed whales. They are often called 'baleen whales', or 'whalebone whales' or 'great whales'. Baleen whales have baleen plates for filtering food from water, instead of having teeth. This makes them different from the Odontoceti.
  * The difference is connected with feeding. Baleen whales strain plankton out of the water, whereas the toothed whales eat larger prey.
+ Mysticeti, Anatomy
  * Baleen whales are generally larger than toothed whales, and females are larger than males. This group includes the largest living animal species, the Blue Whale.
+ Whale, Physiology: Cetaceans
  * Whales breathe through blowholes. Baleen whales have two and toothed whales have one. Breathing first shoots out extra water from the blowhole, making a jet into the air, followed by inhaling air into the lungs.