Bottlenose Dolphins
| Species: Tursiops truncatus |
Order: Cetacea |
| Family: Delphinidae |
Sub order: Odontaceti |
| Class: Mammalia |
Genus: Tursiops |
Bottlenose dolphins are very much misunderstood because
of films like “Flipper” and the wide spread use
of bottlenose dolphins in marine parks.
This is quickly changing throughout the world today, with
captive dolphin shows being forced to close.
Feeding of wild dolphins is now banned in most countries.
In Australia they still feed dolphins in Western Australia
and Queensland. This is done for the overseas tourists as
Australians, in general oppose this practice.
Dolphins that come to humans for food are called "semi
wild dolphins' and anyone who has seen this practice will
notice that the dolphins focus is only on the food bucket.
When wild dolphins come to humans it is not to eat it is
to have fun!
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Colour: Bottlenose dolphins vary in colour from
slate grey to light grey upper parts of the body and shading to
white under the belly. (The shade of a dolphin is one way of telling
dolphins apart.)
Fins & Flippers: Dolphins fins and flippers
are another way of telling dolphins apart. The colour, shape and
notches are like finger prints.
Length & Weight: (Australian waters) Full
grown 2.8m and weigh as much as 270kg.
Lifespan: Bottlenose dolphins live between 30-45
years.
Hunting: Dolphins generally hunt individually
about 50m apart. When a food source is found all other dolphins
in the pod move in and work together.
Feeding: Bottlenose dolphins in South Australia
mainly eat fish and squid - approximately 8kg per day.
Breeding: The female reaches sexual maturity
at around 5 years with a gestation period of 12 months. Calving
can be year round but in South Australian waters most give birth
in February. Calves receive milk from their mothers for about 12-18
months.
Threats: The biggest threat to dolphins in South
Australia is humans. Most people love dolphins but very few respect
them.
Dolphin noises: Underwater you can hear the dolphin
eco locating which is a series of clicks from the dolphins melon.
This is bounced off objects and back to the lower jaw to give the
dolphin a picture of an object. You can also hear high pitched whistles
which are distinct to individual dolphins.

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