Do both Toothed whales and Baleen whales have toil flukes?
153612
I think you mean TAIL flukes.\n\nAnd the answer is 'yes'.
29766
Probably a male orca somewhere, there was a gray whale calf kept for a while recovering from a stranding , but I don't know whether it attained a larger size than a male orca before it was returned to the wild. Blue whales are the only whales that reach 30m and 120 t and they have never been kept in captivity
613887
It's a baleen whale like the humpback and blue whale. It was called the Right Whale because it was the perfect whale for whalers to capture. It floated to the surface after being killed by harpooning and it had plenty of blubber that could be rendered for whale oil which was used to light lamps in the days before electric lights and other uses and its flesh was used as food.
888715
Externally they have spines, tube feet, pedicellaria, all of which are attached to the calcium carbonate test. The muscles attached to all these parts allow movement of these parts. At the ventral mouth reveals their "aristotle's lantern" aka their fancy mouth-mouthparts designed much like garbage disposal blades.  The 5 white teeth set up like a grinding-beak can eat away at the kelp bed.  Inside they have some organs, mostly reproductive organs that hold their gametes between spawnings-breedings.  They also have a digestive system with an anus. They have a water vascular system inside which circulates water for a hydraulic pump, NOT blood!
137713
Most Mammals have up to 40.\nMost Marsupials up to 50.\nGiant Armadillo can have up to 100 teeth.\nSpinner Dolphin can have as many as 252 teeth.\nThe whale shark may take the record with hundreds of rows of teeth, each with hundreds of teeth.
1065492
I highly encourage you to read about and see the stunning pictures of orcas in the April 2005 issue of National Geographic.  \nHere's an exerpt: http://www7.nationalgeographic.com/ngm/0504/feature6/index.html\n\nIt is mentioned in this article that there are NO *confirmed* deaths of humans from orca attacks--ever.  A least one surfer has been roughed up, according to this article, but apparently, the orca let go.  (I don't know how seriously the person was hurt).  Pearl divers in the south seas report being gently nudged, only to turn around and face an orca!  They were never harmed, and it seemed the orcas were curious.  \n\nRead about the encouter an Alaska boy had with an orca in August 2005: http://seattletimes.nwsource.com/html/localnews/2002445380_orca19m.html\nExcerpt from this article:\n""He's about the first person I know of that's actually been approached and touched," said Craig Matkin, a Homer, Alaska-based marine biologist and co-director of the North Gulf Oceanic Society.\n\nThere has never been a documented fatal killer-whale attack on a human. The only relatively well-documented bite was one suffered by a surfer in California in the early 1970s. "\n\nIn any case, orca attack is nothing to worry about because it is so unlikely.\n\nThere are indeed two different types of orcas (aka killer whales).  There is enough data to support the classification of these two types into different species.  Most of this research has been conducted in the Pacific Northwest.  \n\nThe resident orcas, which tend to live around one location, eat only fish.  The transient orcas, which travel great distances and don't prefer one locale in particular, are the ones which eat *only* sea mammals like dolphins and seal lions.  A few decades ago, when orcas were being captured for display in aquariums, a few captive orcas would starve to death instead of eating the fish that they were given.  It was puzzling then, but it makes sense if these orcas were transients.  \n\nResident and transient orcas look different (different size dorsal fins, 4 feet vs. about 6 feet), and have totally different "languages" of communication.\n\nAgain, read that article in National Geographic--it will give you a sense of what powerful hunters they are in the wild, as well as how beautiful and clever they are.
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
674318
I've seen a killer whale attack a juvenile grey whale in the Monterey Bay.  But I don't  think it was because they were Hungy\n\nIn Argentina I saw them beach them selve's going after sea lions.  But I think its mostly for sport.  they would take about 2000 ft from the shoreline and toss them like Volley balls in the air.  They are really cool creatures.
409085
Whales(the blue whale)are the largest mammals.As to why they are,it cannot be answered!Why is the world round?
569073
none.  They are mollusks.  They do have those hard little beaks, but those are not bones any more than a bird's beak is a bone.
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.
502659
The majority of small tooth whales are called dolphins.  They are mammals of the order Cetacea and the families Plantanistidae and Delphinidae and include about 50 species.  All have a beak like snout and sharp, conical teeth.  The term porpoise is sometimes applied to many of the same species, but porpoises, are members of the family Phocaenidae and have a blunt snout and spade or chisel shaped teeth.  The dolphin fish, is neither a dolphin nor a porpoise.  It is a sport fish related to the mackerels.
518390
This is the traditional answer:\n\nSometimes whales are already dead when they become stranded on a beach. When a whale dies, it often tends to float up to the surface after a few days. The carcass is then transported by currents and tides and can come ashore on a beach.\n\nSometimes whales are still alive when they become stranded, most often when they are in groups. Several hypotheses have been put forward to explain these strandings that likely have multible causes. The whales could be sick or injured. Their sense of orientation can be affected by sickness or parasites. It is believed that whales use terrestrial magnetic field and coastal topography for orientation purposes. Thus, a disturbance of these magnetic fields or odd topography could lead to navigational errors. Typically, whales that are put back in the water return to shore and strand anew on the same beach. Their reference system may erroneously tell them that deeper water lies in this direction. Stranding of live animals often happen in the same place, in areas with specific characteristics. Pelagic species that are used to great oceanic depths may be caught by the tide in shallow estuaries. In the case of mass strandings, whales may be following a disoriented leader, or they could be swimming towards an animal that has already stranded and is emitting a distress call. In short, stranding remains a somewhat mysterious phenomenon. \n\nBut the last line of this paragraph tells you the truth...they really do not have a clue.
810038
The Megalodon, a giant shark essentially very similar to the modern Great White Shark, but up to 16 m long, was a major predator in the warm, tropical seas between about 25 million years ago and 2 million years ago.\n\nIn near shore, continental shelf deposits of those ages, the teeth of Megalodon are relatively common.  After 2 million years ago though, they pretty much vanish.  There are a few isolated teeth that appear to be much younger, but they may have been reworked (eroded out of older sediments, and re-deposited as fossils in younger sediments).  The fact that their fossils almost completely disappear and the fact that no one has reliably seen or captured one is a fairly good indication that they are indeed extinct.\n\nAs to why it went extinct, there are several hypotheses, but little hard evidence.  One idea is that Megalodon was primarily a predator on whales, and with the increasing frequency and extent of ice ages in the Pleistocene, the colder polar seas that the whales could move into provided a major barrier to the cold-blooded shark, and without this food source they went extinct.  Another, related theory is that shallow, warm coastal areas with stable and constant whale populations became less common as whales became migratory during glaciations.\n\nThere is also the evolution of the Orca, or killer whale, about 5 million years ago, that may have provided a major source of competition to the Megalodon.  The intelligent, pack-hunting orca may have been much more successful whale hunters than the shark, and driven them out of the evolutionary race.  The orca may have even fed on the Megalodon, or killed them to protect their young.\n\nIt's probably a combination of several major factors; loss of habitat, changes in climate, increased competition, predation from new predators, decreased amounts of safe pupping grounds, etc. that eventually did the Megalodon in.
864207
Yes, it is called a wolphin. Part common bottlenosed dolphin, part false killer whale. I believe. Here's a link to be sure.
496599
The blue whale is blue-gray in color, but often with lighter gray mottling on a darker background (or with darker spots on a lighter background). The underside of its flippers may be a lighter color or white, while the ventral (underside) of the fluke is dark. The blue whale acquires microorganisms called diatoms in the cold waters of the Antarctic and North Pacific and North Atlantic which give the underside of its body a yellowish green caste. Because of this yellow color, the early whalers gave it the name "sulfur bottom."
87625
parasitic ocean creatures?