are dolphins nocturnal?
83895
No,dolphins are not nocturnal.
791387
I recently saw a programme on National Geographic Channel where they showed many animals masturbating.  Can you believe that dolphins are pervs?LOL.I guess even animals need a little fun!
1015287
.WHALES AND DOLPHINS:\n\nWhales and Dolphins are marine animals. They live in oceans around the world. Whales and Dolphins come from the same family, CETACEA (sey-tay-sha) . They both breath from a blowhole located at the top of their head. Whales and dolpins are mammals. They are mammals because they have lungs not gills,they have hair not scales , and they also have give live birth and don't lay eggs. There are only about 80 kinds of whales and dolphins that we know of right now.\n\nWHALES:\nWhales are very large animals. They can grow up to 100 ft. or more in length. They can weigh up to 200 tons or more. Whales live in families called pods. These pods vary in numbers and consist of family members and family friends. Whales live in these families their whole life. Group living is safer when other whales or sharks attack. It also makes it easier to find food. Whales are always migrating. They travel to find food, breed and have young.\nWhales do not have eyelids. They rely on thick oily tears to protect their eyes. Whales hear from little holes behind their eyes.\n\nWhales talk to each other by making high pitched sounds like whistles, clicks, squeaks, rattles, and groans.\n\nTo help protect the whales from extinction please DO NOT throw nets, fishing lures, or other fishing gear ocean\n\nDOLPHINS:\nDolphins live with the whales in the oceans. But dolphins come much closer to the shore. They will come as close to the shore as you or I can walk without going under water. Dolphins have teeth.\nLooking at a dolphin you would not think it as a nose, but surprise...it does! They have nostrils called blowholes. Over millions of years of evoloution whales and dolphins nostrils moved to the top of their head. This allows them to breath by surfacing instead of them sticking their whole head out of the water.\nThe first thing a newborn dolphin must do is to go to the surface to breathe. But the baby can not swim so its mother and a another dolphin will help push the baby to the surface for its first breath of air. The baby will be able to swim in about 30 min.\nDolphins are fast swimmers. When a speeding boat passes the bottlenose dolphin, it will start to race out in front . They will take off hitting the water and keep going.\nDolphins navigate by following the hills and mountains of the ocean floor, by tracking the sun, by sensing currents, and by tasting the water along the journey.\nA dolphin's sound probably originated in its nasal passages. These nasal passages are located on the top of the head. Dolphins can make sounds to see what lies ahead. This sense is called echolocations. The dolphins' sound waves hit an object and the echo bounces back. Echolocation sounds are called sprays. Sprays are so strong they can stun another whale. Dolphins don't "point" their melons at any other sealife except their enemies.\n\nSHARKS:\nOut of all the species walking, flying, slithering or swimming, there aren't many who have been around as long, survived as well, or come in so many shapes and kinds as the shark. The earliest evidences of sharks are isolated spines, teeth and scales that appeared about 430 million years ago in the Silurian Period, known as the "Age of Fishes". Sharks have a sleek, streamlined design which helps them swim without using up a lot of energy.They certainly need to conserve their energy because they never really sleep and most of them never stop swimming.\n\nSome sharks are fierce predators, and would be happy to eat you if they encountered you. Almost any shark six feet or longer is a potential danger, but three species have been identified repeatedly in attacks: the Great White Shark, the Tiger Shark and the Bull Shark . All three live world wide, reach large sizes and eat large prey such as marine mammals or sea turtles. But most sharks never grow longer than five feet and never even see anyone with legs and arms anyway. People kill thousands more sharks every year than sh
571640
Both dolphins and porpoises are mammals. Even though they both live in the ocean, they are not fish. They do not have breathing gills. They have lungs and breathe air. Both also give birth to live young and nurse those young. A mammal is also characterized by having the presence of hair: when dolphins and porpoises are small, there are small hair follicles. \n\nDolphins and porpoises belong to the same scientific order, Cetacea. This order includes all whales, even the great whales, to which both dolphins and porpoises are related. All cetaceans are completely aquatic mammals, have a streamlined body, a tail fluke, and a blowhole (which is what these air-breathing animals use to breathe). The dolphins and porpoises are also classified in the scientific suborder, Odontoceti, which are the toothed whales. All odontocetes also have the ability to echolocate, the ability to detect objects in their underwater environment using the echoes of a sound, much like sonar. \n\nPorpoises and dolphins are classified into two different families. The porpoises are in the family Phocoenidae and the dolphins are in the family Delphinidae. When separated at the family level, dolphins and porpoises are as physically different as cats and dogs.
168933
The shape of the pupils on cats and reptiles are similar because they filter different amounts of light than other organisms.  These organisms are usually nocturnal hunters, though they may be required to move during the day.  Their oblong pupils can be shut down much farther than round ones to block out bright sunlight that might hurt their retinas, and are adapted to open wider at night to allow more light in so that they can see.
745467
Dolphins do breathe air, but their skin/eyes/other stuff would dry out and eventually they would die
399296
Dolphins shut down half of their brain at a time to give rest, however, it has been recently found that age may be a factor in this.  <See Below>\n\nBeing a new mother is exhausting, but if you're a dolphin or a killer whale, you may not be getting any extra sleep-time to recover, in fact you may not be getting any sleep at all. Scientists in California and Russia have discovered that both dolphin and killer whale mothers and calves apparently go with no sleep for the first few months of the new baby's life.
390606
not primarily, they can learn to stay up late, \nbut they sleep at night usually.\n\nThey swim in circles while sleeping, we think \nmaybe one half of the brain sleeps while the outside\neye remains open and semi-aware...
311363
They usually stay pretty still at night,, I assume they are hungry. Are you talking salt or fresh water? salt water usually feed on the first incoming tide of the day.
311369
Researchers say that dolphins, along with whales and porpoises, are descendants of land-living mammals, most likely of the Artiodactyl order. Modern dolphin skeletons have two small rod shaped pelvic bones thought to be left-over hind legs. They entered the water roughly 50 million years ago.
454154
Dolphins are being protected now, and are growing in numbers again, and they seem pretty happy when I use to see them! But im not a dolphin, yes yes...believe it or not...I'm not. =)
516925
Dolphins are mammals, first of all, which means that they reproduce and female give births to offsprings (babies).\n\nThe babies stay often with their mothers until they are capable of hunting by themselves.\n\nBy then, they are more independent but stay in groups.\nLater on as adults, dolphins find mates and reproduce and give birth again to dolphins.\n\nLife cycle repeats...\n\n\nFor more info:\n\nhttp://library.thinkquest.org/J0110164/Life%20of%20the%20dolphin/life%20cycle.htm
305663
whatt mahi mahi? a dolphin?
100057
Dolphins represents knowledge.  And if you a colleting them, you have a strong desire to achieve knowledge!!!!  is that correct in your case!!!!???
206488
pigs and dolphins for sure
960262
There are certainly many species of animals that are known to be very playful. Dolphins are known for their playful nature as are many Primates.  As with all animal behaviour one must be careful not to anthropomorphize, as what we judge to play can actually be a totally different behaviour for that animal.  The only animals that can put a solid number on their play hours are humans and we play more than any wild animal out there.
652857
Strength in numbers!  They travel in very large groups. \n\nThey are very speedy and smart..both of those combined and you got a dolphin that can outswim and outsmart many a foe.\n\nYou may enjoy this site. \n\nhttp://www.nationalgeographic.com/kids/creature_feature/0108/dolphins.html