Common Dolphins
Species:
Delphinus Delphis - short beaked
Delphinus capensis - long beaked |
Order: Cetacea |
| Family: Delphinidae |
Sub order: Odontaceti |
| Class: Mammalia |
Genus: Delphinus |
South Australia is home to thousands of common dolphins.
They live in the blue deeper waters off Adelaide and around
Kangaroo Island.
Commons are totally different to bottlenose - they are smaller
with a lot more energy. They don’t like swimmers but
do like a fast moving boat.
Pod sizes are around 50 but I have had three pods join together
to make an exciting sail.
Common dolphins whistles can easily be heard on deck.
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Colour: Black on top and white under belly with
cream sides. Common dolphins have clean lines with an hour glass
shape on their flanks. Their clean lines makes it hard to tell them
apart
Fins: The fin on a Common dolphin is the best
way to identify individual dolphins.
Length & Weight: (Australian waters) Full
grown 2m and weigh as much as 125kg.
Lifespan: Common dolphins live between 35-40
years.
Hunting: Common dolphins spread out over a ½
km radius. When a school of fish is located they will all come in
to the school. I have not seen them herd fish instead the dolphins
use their speed and split the schools into small schools. Common
dolphins regularly follow prawn trawlers for an easy feed (discarded
fish picked up from the prawn nets).
Breeding: The female reaches sexual maturity
at around 4 years with a gestation period of 11 months.
Threats: In South Australia their threats are
minimal, but around the world many commons get caught in purse seine
nets.

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