Page 19 - World of Animals - Issue #28 Magazine
P. 19

Digestive tract                    Eyes
                        When compared to other             Instead of just
                         herbivores, seals have a         closing their eyes
                      relatively short digestive system.   underwater, harp
                       This is because a carnivorous     seals have a special
                      diet provides such high quality    membrane covering
                       nutrients; it takes less time to   their eyes to protect
                       digest. This is in contrast to a   them from the harsh
                       herbivorous diet, where more         salty waters.
                      digestion is needed to acquire
                      the same amount of nutrients.






                                                                      Nose
                                                               While underwater, harp
                                                                seals will sacrifice their

                                               Insulating fur  sense of smell and close
                                                               their nostrils to prevent
                                                                   water entering.



                                                    Kidney
                                                                                                            Whiskers
                                                                                                      Even in the murky depths of
                                                                                                     the sea, they are able to sense
                                                                                                     their prey using their sensitive
                                                                     Intestine                        whiskers, which can detect
                                                                                                       movement and vibrations.



                                                                            Colon



                                                                                                           Hind flipper

                                                                                   Bladder         The hind flippers are corrugated into
                                                                                                  five digits, each with smaller, narrower


                                                                                                    claws than the front flippers. They
                                                                                                   are not able to rotate the hind flipper

                                                                                                    underneath the body to walk, and
                                                                                                   instead use their two front flippers to

                                                                                                           pull themselves.




                                                                         Closest family

                                                                         Closely related to the harp seal are...
                  Liver

                                          Fat layer





                                                                         Northern fur seal  Monk seal          Hooded seal
                                                                         This species was almost   In ancient Greece, monk   This seal is known and named
                                                                         driven to extinction in the   seals were placed under the   for the large ‘hood’ of the male.
                                                                         18th and 19th centuries due to   protection of Poseidon and   A unique appendage that can

              Sexual maturity (male)    Old age                          hunting pressures. They are   Apollo because of their great   be inflated to what resembles
              6-8 years                 20-30 years                      now protected, but face a new   love of the sea and sun. The   a red ball, it hangs from the
              Males take slightly longer to mature.   Harp seals live for a long time in the wild.   threat through an increase of   Mediterranean monk seal   forehead and grows in size

              They will become promiscuous,   The average lifespan is around 20 years,   krill fisheries depleting their   is one of the world’s most   when the male is threatened
              breeding for the rest of their lives.  but some have been recorded to live to 35.  food source.   endangered mammals.   or excited.
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