are a few different porpoise dolphin
relatively small cetaceans, generally measuring up to 2m long and weighing up to
200kg, but often less than 100kg.
They often live in coastal waters and
swamps, estuaries, bays and coastal rivers. Most of them are slow
swimmers, travel in small groups, and don't tend to follow boats, as do
Physiological features include at least 11 pairs of teeth, and small
flippers. Although they are often called dolphins, they differ from
real dolphins by having flattened teeth and no beak. They also have a
more rounded head than real dolphins.
(Phocoena phocoena) can grow up to 2m long and can weigh up to 75kg.
It is found in
coastal waters and inlets in the Northern Hemisphere, in places like
Alaska, British Columbia, eastern coast of Canada, around Iceland, many
European oceanic coasts and western coast of northern Africa. It is
classified as a vulnerable species.
is one of the largest in this group, weighing up to 200kg and measures up
to 2.4m long.
It is found in the Pacific Ocean between about 40 and 60
degree latitudes north. They are not found in the Southern Hemisphere
or in the Atlantic Ocean. There are about 1,000 000 individuals and the
species is classified conservation dependent.
(Phocoena spinipinnis) weighs about 70kg and lives in coastal rivers
and along the coasts of South America (between northern Peru in west
and Rio de Janeiro in the east.
(Phocoena dioptrica) weighs up to 80kg and is only found in Antarctican waters
and also along the eastern coast of southernmost South America.
Vaquita Porpoise (Phocoena sinus) is
probably the most vulnerable of all Cetaceas, due to its very small
distribution - it is only found in the Gulf of California and there are
only about 500 individuals, while about 30 individuals annually get
accidentally caught in shark and fishing nets.