DOLPHINS
 |
| look at that face! so cute |
Dolphins are marine mammals closely related to whales and porpoises. They are found
worldwide, mostly in the shallower seas of the continental shelves, and are carnivores,
eating mostly fish and squid. Dolphins are among the most intelligent animals, and
their often friendly appearance, an artifact of the "smile" of their
mouthline, and seemingly playful attitude have made them very popular in human culture.
Dolphins have a streamlined fusiform body, adapted for fast swimming. The
tail fin, called the fluke, is used for propulsion, while the pectoral fins together with the
entire tail section provide directional control. The dorsal fin, in those species
that have one, provides stability while swimming.
The head contains the melon, a round organ used
for echolocation. Dolphins breathe
through a blowhole on top of their head.
The trachea is anterior to the brain. The dolphin brain is large and highly
complex, and is different in structure from that of most land mammals.Unlike most mammals, Some dolphins do not have
hair.
Most dolphins have acute eyesight, both in and out of
the water, and they can hear frequencies ten times or more above the upper
limit of adult human hearing. Dolphins are capable of making a broad range of
sounds using nasal airsacs located just below the blowhole
 |
| Dolphins love to jump. here is the "Jumping Dolphin" |
Generally, dolphins sleep with only one brain hemisphere in slow-wave sleep at a time, thus
maintaining enough consciousness to breathe and to watch for possible predators
and other threats. Living in water with strong currents and potentially
dangerous floating debris, it must swim continuously to avoid injury. As a
result, this species sleeps in very short bursts which last between 4 and
60 seconds.
Members Of Group:
- Faramitha Rahayu
- Sekar Arum W.
- Tania Noviyanti
- Uray Ria Aprini
