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Commerson’s Dolphin (Cephalorhynchus commersonii)

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PHYLUM: Chordata
CLASS: Mammalia
ORDER: Cetacea
FAMILY: Delphinidae
GENUS: Cephalorhynchus
SPECIES: commersonii

TOOTHED or TOOTHLESS (BALEEN): Toothed

FRESHWATER, SALTERWATER or BRACKISH: Saltwater

HABITAT: Cold temperate and subantarctic waters of southern South America. Coastal waters.

LENGTH (maximum): 4-6 Ft

WEIGHT (maximum): 190 lbs

RELATIVE SPECIES: Hector’s Dolphin, Chilean dolphin

NEIGHBORING SPECIES: Chilean Dolphin, Burmeister’s porpoise.

PREDATORS: Humans

This species is classified as DATE INCOMPLETE according to the IUCN's Red List.
This species is classified as DATE INCOMPLETE according to the IUCN’s Red List.

THREATS: Trapped in fishing gear. Used to be hunted and used for crab bait, this is now illegal but has greatly depleted the population.

DIET: Shrimp and small fish such as silversides, sardine and hake.

MANNER OF FEEDING: Encircle schools of fish and dart through the center. Sometimes herds fish to the shore where they become stranded. In captivity they are fed herring.

BEHAVIOR: Groups of 2-3, but sometimes more. Likes to play in waves and wakes. Will follow ships to bow ride. Enjoys acrobatic displays at the surface. Swims upside down and spins underwater.

REPRODUCTION: Gestation is about 12 months. Calves are born from October to March.

LIFE SPAN: At least 18 years

COOL/GROSS/WEIRD:

  • Can be seen in captivity.
  • Young dolphins grow very fast.
  • Very distinct white and black markings.

SOURCES:

  • Knopf, Alfred A. Guide to Marine Mammals of the World.Random House. 2002

 

-TSF-

 
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