### animal | vertebrate | mammal | whale:

Beluga whale
* Most beluga whales detect sound
  - eat fish
  - feed on fish
* Most beluga whales have breaths
  - expectancy
  - life expectancy
  - vision
  - white skin
  - years
* Most beluga whales inhabit arctic regions
  - lack dorsal fins
  - mate in springs
  - migrate south as the ice pack advances in the autumn
  - use flippers
* Some beluga whales belong to families.
* Some beluga whales die from gastrointestinal problems
* Some beluga whales have ability
  - blubber layers
* Some beluga whales have thick blubber layers
  - hold breaths
  - live in wild arctic attraction
  - migrate to water
  - use echolocation
  - visit estuaries seasonally to breed and feed
* hunt fish.
* live for years.

### animal | vertebrate | mammal | whale:

Blue whale
* Most blue whales eat krill
  - feed on plankton
* Most blue whales have distribution
  - eyes
  - flat heads
  - global distribution
  - hearts
  - muscles
  - penises
  - live in oceans
* Most blue whales migrate to polar regions
  - occur in oceans
* Most blue whales prefer ocean water
  - use sound
* Most blue whales weigh as metric tons
* Some blue whales are bigger than the biggest dinosaur
  - eaten by whales
  - feed on shrimp
* Some blue whales have predators
  - spiral valves
  - teeth
  - voices
* are a light bluish gray overall, mottled with gray or grayish white
  - among Earth's longest-lived animals
* are among the largest animals ever to have lived
  - loudest animals on the planet
* are an endangered species
  - overall blue-gray color, mottled with light gray
  - baleen whales
  - blue-gray in color with lighter mottling on the sides and back
  - endangered animals because of their blubber which people want
  - found throughout the world's oceans
  - krill feeders
  - large whales
  - light bluish gray on their dorsal side and mottled gray whitish on their bellies
  - long and streamlined
  - mammals
  - part of a family of whales called rorquals
  - symbolic ocean giants
* are the largest animal on earth
  - animals ever known to have lived on Earth
  - creatures on earth
  - mammal ever known to have lived on Earth
* are the largest mammals known to have lived on Earth since the beginning of time
  - of all animals
  - warm-blooded mammals
* are, in general, eaten by creatures much smaller than themselves.
* consume kgs.
* die of natural causes and are sometimes preyed upon by packs of killer whales.
  - mostly krill, which is technically plankton also
  - the krill using a special type of filter on their mouths called a baleen
* engage in an extensive courtship process that culminates in mating.
* face threats from entanglement in fishing nets, pollution, and illegal whaling.
* feed almost exclusively on euphausiids or krill, a shrimp-like planktonic crustacean.
* feed on krill
* filter their food through their baleen plates.
* form close ties with one another and are often seen in groups of two or four.
* graze on microorganisms.
* have a four-chambered heart with a closed circulatory system
  - complex eyes
  - many unusual characteristics
  - the largest penises on Earth
* is the fastest mammal in the water.
* live between sixty to ninety years.
* live in all oceans of the world
* make thunder below our human range of hearing.
* measure feet.
* migrate to polar regions during the summer months of that region
* occur in all oceans of the world
* open mouths.
* prefer deeper ocean waters to coastal waters
* reproduce via sexual meiosis.
* swim individually or in small groups.
* undergo a very elaborate mating ritual.