Compared to sharks, whales have smooth skin (no scales), and their tails move up-and-down for swimming.
- 1 Does a whale have scales?
- 2 Did wolves evolve from whales?
- 3 What were whales before they evolved?
- 4 Did hippos and whales evolve from the same common ancestor?
- 5 Does a whale shark have scales?
- 6 Did whales used to walk?
- 7 Does shark have scales?
- 8 How did whales lose their legs?
- 9 Why did whales go back into the ocean?
- 10 Do manatees share an ancestor with whales?
- 11 What animal is closest cousin to dolphins?
- 12 Are hippos bulletproof?
- 13 What are orcas closely related to?
- 14 Are whales related to pigs?
- 15 Are rhinos and horses related?
- 16 Do stingrays have scales?
- 17 Which fish do not have scales?
- 18 Do whales have sharp teeth?
- 19 Do lizards have scales?
- 20 Why whale shark has no teeth?
- 21 Do whale have teeth?
- 22 Are whales dinosaurs?
- 23 Why can’t whales survive on land?
- 24 How old are whales as a species?
- 25 Did dolphins walk on land?
- 26 How did ocean mammals evolve?
- 27 Did whales evolve from dogs?
- 28 What is found in the 375 million year old fish?
- 29 Does the blue whale still exist?
- 30 Is hind a limb?
- 31 How did whales get so big?
- 32 Are mammoths related to elephants?
- 33 Are whales related to hippos?
- 34 Was there a prehistoric killer whale?
- 35 Did orcas hunt Megalodon?
- 36 Are walrus and manatees related?
- 37 Are hippos related to horses?
- 38 Are hippos closely related to pigs?
- 39 What is the largest creature that has ever lived?
- 40 Are Crocodiles bulletproof?
- 41 What animal is bulletproof?
- 42 Has a hippo ever eaten a human?
- 43 Are Pablo Escobar’s hippos still alive?
- 44 Are hippos related to?
- 45 Are hippos hoofed?
- 46 Can horses mate with zebras?
- 47 What is an elephant’s closest relative?
- 48 What is the closest relative to a horse?
- 49 Does shark have scales?
- 50 Do sharks and rays have scales?
- 51 Can Manta Rays sting?
- 52 Does a clownfish have scales?
- 53 Does tilapia have scales?
- 54 Do puffer fish have scales?
Does a whale have scales?
Whales even have a little bit of hair on their smooth skin, usually on the top of their head. Fish have scales. Whales even give birth to live baby whales that will get milk from their mom for food.
Did wolves evolve from whales?
the wolf, and are more closely related than a whale and shark. found. They show that whales descended from a land mammal. This land mammal likely shares a common ancestor with wolves.
What were whales before they evolved?
Both hippos and whales evolved from four-legged, even-toed, hoofed (ungulate) ancestors that lived on land about 50 million years ago. Modern-day ungulates include hippopotamus, giraffe, deer, pig and cow.
Did hippos and whales evolve from the same common ancestor?
Convergent evolution
Hippos evolved from a group of anthracotheres about 15 million years ago, the whales evolved from their common ancestor over 50 million years ago. This common ancestor was terrestrial, so it is remarkable that it gave rise to two different types of aquatic mammals, one marine and one freshwater.
Does a whale shark have scales?
Whale sharks and other shark species have dermal denticles that cover their bodies and act like scales, according to the Smithsonian Institution’s Ocean Portal.
Did whales used to walk?
Although whales are expert swimmers and perfectly adapted to life underwater, these marine mammals once walked on four legs. Their land-dwelling ancestors lived about 50 million years ago.
Does shark have scales?
It is made up of tiny teeth-like structures called placoid scales, also known as dermal denticles. These scales point towards the tail and helps to reduce friction from surrounding water when the shark swims. Because of this, if someone rubbed the skin from the head towards the tail, it would feel very smooth.
How did whales lose their legs?
In findings to be published this week in the Proceedings of the National Academy of Sciences, scientists say the gradual shrinkage of the whales’ hind limbs over 15 million years was the result of slowly accumulated genetic changes that influenced the size of the limbs and that these changes happened sometime late in …
Why did whales go back into the ocean?
Vertebrates evolved in the sea and eventually moved onto land. The ancestors of whales later returned to the sea, taking advantage of its rich food supplies.
As much as they may resemble each other, manatees don’t share any evolutionary relationship with other marine mammals. Most marine mammals, such as dolphins, whales and porpoises, are members of the order Cetacea and descended from a group of animals also known as Cetacea.
What animal is closest cousin to dolphins?
The closest living relatives of dolphins today are the even toed ungulates such as camels and cows with the humble hippopotamus being the closest living relative.
Are hippos bulletproof?
The skin of a hippo can be 2 inches thick throughout his body. This thick hide serves several purposes, such as protection from harsh sun rays and bullet hits. The thickness of the skin and bulky size of hippos make hippos almost bulletproof or immune to bullets.
The closest-living relatives of orcas are hippos, but a modern example of what their ancestor may have been like is the chevrotain, a small deer species that dives into water when threatened, hiding from predators below the surface.
According to molecular evidence, the closest living relatives of whales are, quite surprisingly, the artiodactyls, a group of hoofed mammals that includes deer, cows, sheep, pigs, giraffes, camels and hippos.
Rhinos are related, somewhat distantly, to a favourite domesticated animal and pet: the horse! Horses or equids, tapirs and rhinos are in the same group or ‘order’ and are known as ‘Perissodactyls’.
Do stingrays have scales?
Stingrays are covered in Scales.
Which fish do not have scales?
Fishes that don’t have scales include the clingfish, catfish, and shark family, among others. Instead of scales, they have other layers of material over their skin. They can have bony plates that are also covered by another layer or tiny, teeth-like protrusions covering their skin.
Do whales have sharp teeth?
Like odontoceti whales, we have teeth — so we know what those are. Whales are carnivores like great white sharks and wolves so like great whites and wolves all of a whale’s teeth are pointy and sharp. They use their sharp teeth for hunting their prey and for tearing flesh.
Do lizards have scales?
Except for openings of nostrils, mouth, eyes, and cloaca, most lizards are completely covered in scales. Scales may be smooth and overlapping, form a mosaic of flat plates, or have keels or tubercles. The arrangement varies among species and by body part.
Why whale shark has no teeth?
Whale sharks have evolved as filter feeders, meaning having sharp teeth isn’t necessary anymore. It’s possible that some ancient relative of the whale shark included larger prey in its diet, explaining the teeth.
Do whale have teeth?
Whales possess a varying number of teeth, depending on the individual species. Some kinds of whales only have one or two teeth, while others might have 240 teeth or even more. Dental patterns can vary. Some toothed whales have teeth in both their upper and lower jaws.
Are whales dinosaurs?
The Origin of Whales or the Evolution. The first whales appeared 50 million years ago, well after the extinction of the dinosaurs, but well before the appearance of the first humans. Their ancestor is most likely an ancient artiodactyl, i.e. a four-legged, even-toed hoofed (ungulate) land mammal, adapted for running.
Why can’t whales survive on land?
Whales can only survive a few hours on land. They breathe the air just fine. The problem is that their fat holds in too much heat. When the water is not there to absorb the heat, they die.
How old are whales as a species?
Cetaceans (whales, dolphins, and porpoises) are an order of mammals that originated about 50 million years ago in the Eocene epoch. Even though all modern cetaceans are obligate aquatic mammals, early cetaceans were amphibious, and their ancestors were terrestrial artiodactyls, similar to small deer.
Did dolphins walk on land?
Fossil remains show dolphins and whales were four-footed land animals about 50 million years ago and share the same common ancestor as hippos and deer. Scientists believe they later transitioned to an aquatic lifestyle and their hind limbs disappeared.
How did ocean mammals evolve?
Marine Mammal Groups
They evolved from a group of hoofed terrestrial ancestors within the order Artiodactyla more than 50 million years ago during the Eocene period. Their closest living relatives are the hippopotamuses, followed by the ruminants (deer, sheep, cows and their relatives).
Did whales evolve from dogs?
It shows one of the critical stages between the dog-like terrestrial ancient whale and the modern marine giant. Both findings establish that whales came from the group of mammals called even-toed ungulates, which includes hippos, pigs, sheep, cows, camels and deer.
What is found in the 375 million year old fish?
The discovery of well-preserved pelves and a partial pelvic fin from Tiktaalik roseae, a 375 million-year-old transitional species between fish and the first legged animals, reveals that the evolution of hind legs actually began as enhanced hind fins.
Does the blue whale still exist?
How Many Blue Whales Are Left? Sadly, there are only about 10,000 to 25,000 blue whales left in the world today. Though it may sound like a large number, this is incredibly low.
Is hind a limb?
The back limb, or the posterior extremity of an animal. The hind limb consists of the femur, tibia, fibula, tarsals, metatarsals and toes. When referring to the back legs of four-legged animals the term hind leg is used more often than hind limb.
How did whales get so big?
Pyenson and Vermeij hypothesize that marine gigantism was set on a fast track because of a particularly productive ocean during the onset of the Pleistocene, roughly 2.5 million years ago. Giant ice sheets ground the earth into nutrient rich bits that found their way into the sea, potentially helping whales gain mass.
The woolly mammoth is perhaps the most well-known extinct mammal, but the charismatic creature wasn’t around for very long. As members of the family Elephantidae, woolly mammoths were themselves elephants. Their last common ancestor with modern-day elephants lived somewhere in Africa about 6 million years ago.
Hippos and whales may look different in many ways, but they are actually each others’ closest living relatives—sharing a common ancestor that lived about 55 million years ago.
Was there a prehistoric killer whale?
Egyptian scientists have identified a new species of prehistoric killer whale from a 43-million-year-old fossil that was found in Eqypt’s “Whale Valley”. The ancient fossil, which was unearthed in Egypt’s Western Desert in 2008, has been named as Phiomicetus Anubis, after the god of death in ancient Egypt.
Did orcas hunt Megalodon?
Megalodons were wiped out when killer whales invaded: Competition for food drove 60ft sharks to extinction 2 million years ago. Jaws may have terrified you at the cinema, but the iconic great white would have been dwarfed by Carcharocles megalodon, the largest shark in the history of the planet.
Marine mammals are not closely related
Despite the many similarities between killer whales, walruses, and manatees, they are — as surprising as it may sound — more closely related to wolves, cows, and elephants than to each other.
The name “hippopotamus” comes from a Greek word meaning “water horse” or “river horse.” But hippos are not related to horses at all—in fact, their closest living relatives may be pigs or whales and dolphins! There are two species of hippopotamus: the river, or common, hippo and the much smaller pygmy hippo.
Thewissen, a professor at Northeastern Ohio Universities College of Medicine, and his colleagues. Thewissen says that whales are more closely linked to an extinct pig-like animal, often known as India’s pig or Indohyus, while hippos are closely related to living pigs.
What is the largest creature that has ever lived?
Far bigger than any dinosaur, the blue whale is the largest known animal to have ever lived. An adult blue whale can grow to a massive 30m long and weigh more than 180,000kg – that’s about the same as 40 elephants, 30 Tyrannosaurus Rex or 2,670 average-sized men.
Are Crocodiles bulletproof?
Only crocodile’s belly has a gentle skin. Skin on their back contains bony structures (called osteoderms) which make skin bulletproof. Crocodiles have excellent eyesight (especially during the night).
What animal is bulletproof?
Pangolins are the only mammal known to have developed scales in this fashion, and though they have been utilised by humans for armour coats for centuries, it remained a mystery how they retained their shape and durability over time.
Has a hippo ever eaten a human?
A man, who survived an attack by a hippopotamus, has described the terrifying moment he was swallowed by the animal. Paul Templer was working as a tour guide on Zimbabwe’s Zambezi River in the 1990s when the hippo emerged from the water and plucked him out of his canoe.
Are Pablo Escobar’s hippos still alive?
After Escobar was killed in 1993, most of the animals were relocated except for the so-called “cocaine hippos.” Authorities thought they would die but they did not and now, about a hundred roam near the estate.
An ancient relative of the hippopotamus likely swam from Asia to Africa some 35 million years ago, long before the arrival of the lion, rhino, zebra and giraffe, suggests a new study.
Are hippos hoofed?
Hippopotamuses. The hippopotamus is an even-toed hoofed mammal, but scientists think it is more closely related to whales and dolphins than other even-toed hoofed mammals.
Can horses mate with zebras?
Horses and zebras can reproduce, and whether the result is a zorse or a hebra depends on the parents. It’s an unusual pairing usually requiring human help. Other zebra hybrids include the zonkey. Properly imprinted, equine hybrids can be trained like other domestic donkeys and horses.
What is an elephant’s closest relative?
Hyraxes are sometimes described as being the closest living relative of the elephant, although whether this is so is disputed. Recent morphological- and molecular-based classifications reveal the sirenians to be the closest living relatives of elephants.
What is the closest relative to a horse?
But several species survive at present. They include rhinoceroses and tapirs, the horse’s closest living relatives.
Does shark have scales?
It is made up of tiny teeth-like structures called placoid scales, also known as dermal denticles. These scales point towards the tail and helps to reduce friction from surrounding water when the shark swims. Because of this, if someone rubbed the skin from the head towards the tail, it would feel very smooth.
Do sharks and rays have scales?
Placoid (pointed, tooth-shaped) scales are found in the cartilaginous fishes: sharks, rays. They are also called dermal denticles.
Can Manta Rays sting?
Manta rays have long tails like stingrays. Only they don’t have barbs. That means that manta rays can’t sting you or anybody for that matter.
Does a clownfish have scales?
The orange clownfish has 30-38 pored scales with no interruptions along the lateral line. Their dorsal fins contain a total of 9 or 10 spines.
Does tilapia have scales?
The scales of Tilapia are surrounded by an envelope of scleroblasts responsible for the production of layers of collagen that constitute the bulk of the scale. The scleroblasts adjoining the lateral face of the oldest scale region gradually atrophy.
Do puffer fish have scales?
Puffer fish do not have scales. Their skin is thick and rough. Some species have spines on the skin, which offer additional protection against the predators.