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Sharks
When many think of sharks, they think of the movie Jaws or a dangerous man-eating fish. In reality, sharks is a large group of fish that includes very small to much larger fish. Some can be harmful to man and others are harmless. To delve into this interesting and diverse group of cartilaginous saltwater fish that have sharp teeth and a bad reputation, ask your questions in this category.
5,520 Questions
Are manta rays afraid of sharks?
The normal manta ray is usually non-aggressive, but it is capable of defending itself with its dangerous tail. A manta ray may also ram its foe, although this clumsy attack is treated as a secondary attack.
Do lemon sharks Hibernate or Migrate?
They must migrate... Hibernation is when an animal sleeps through the cold winter months and sharks don't do that.
Are shark teeth as hard as steel?
This is a poorly defined question, because the difficulty of biting through steel depends upon how thick the steel is, as well as the kind of steel (some steel alloys are much harder than others), and in addition, there are many different kinds of sharks, and some have stronger jaws than others. I will note that if the steel is sufficiently thin (steel foil) even we human beings can bite through it. I will also note that sharks do not normally encounter steel anyway, and they much prefer to bite fish and seals. That said, it is true that sharks have very strong jaws. That is probably what you are trying to find out.
Why are sharks teeth black that you find?
Shark teeth are made up of calcium phosphate, which is the mineral apatite. Although shark teeth are sturdier than the cartilage that makes up their skeleton, the teeth still disintegrate over time unless they are fossilized. This is why you rarely find white shark teeth on a beach.
Shark teeth are preserved if the tooth is buried, which prevents decomposition by oxygen and bacteria. Shark teeth buried in sediments absorb surrounding minerals, turning them from a normal whitish tooth color to a deeper color, usually black, gray or tan. The fossilization process takes at least 10,000 years, although some fossil shark's teeth are millions of years old! Fossils are old, but you can't tell the approximate age of a shark tooth simply by its color because the color (black, gray, brown) depends completely on the chemical composition of the sediment that replaced the calcium during the fossilization process.
Why do sharks smell blood faster in the warm tropical seas then the cold seas?
this happens because the heat of the human blood temperature will be attracted easier in warm water. But if they smell blood faster won't they swin faster in warmer water? No because cold water is much more of an ocean temperature water so sharks swim faster in cold water.
Do sharks always hang around as a group?
Sharks can approach VERY much to the coastline, in VERY shallow waters, but there are no shark species that will deliberately swim to the sand in a beach to pursue a prey, like the killer whale (Orcinus orca) when attacking seals resting in the sand near the water.
Just to give you an example, the very large and dangerous tiger shark (Galeocerdo cuvier) have been observed in depths as shallow as 3 metres, normally thought to be too shallow for a species of its size.
Bull sharks (Carcharhinus leucas) can be found in even shallower waters (specially in freshwater, far away from the mouths rivers).
Last year, an adult swimmer named Lungisani Msungubana, aged 25, was killed in the second beach in Port St. Johns, South Africa, by a bull shark in waist-deep water. Only his amputated body torso was recovered, after a three-day search for his corpse.
Yes. Because it goes to the supermarket and buys them every day.
What Sharks are often referred as?
Sharks have induvidual names like The hammer head or the great white shark
No.
Sharks have a cartilaginous skeleton.
(Although very large sharks, like C. Megalodon and other extinct megatooth sharks, had vertebral centra so hard that they fossilized in a similar way as bone tissue.)
Is there any other place a hammerhead shark lives than the ocean?
Yes. A hammerhead usually lives in the warmish open ocean and usually swim in packs
How huge is a great white shark?
VERY. some sharks can severly damage boats even sink them. some sharks are capable of seeds up to 45mph and leaps of 20ft out of the water. most sharks, however, are docile and will leave you alone if you leave them alone. never does a shark attack unless it is provoked or mistakes surfers to look like seals. hey people make mistakes to. also we'er in their territory, they were here first.
Where can one see pictures of shark teeth?
Actually, there are several different places in order to view pictures of sharks online. The best and most comprehensive place would be for sure "Google Images". Here one can simply enter the term "sharks" in order to get thousands of shark pictures instantly. Another site more dedicated to animals offering breathtaking shark images would be "Apex Predators". Additionally the sites "SeaPics" and "Elasmodiver" offer great shark pictures.
What adaptations does the whooping crane have that helps it survive in its environment?
One of the interesting adaptations common to most wading waterfowl is the counter-current heat exchanger in the blood vessels of the legs. Warm blood from the heart are pumped down through arteries which lay very close to the veins containing cold blood coming up from the feet. As the warm blood goes down the leg, it warms the cold blood coming up, and cools the blood. By the time the blood gets into the feet, it's already pretty cold, so not much of the animal's heat is lost to the cold water. By the time that the "cold" blood reaches the body again, it's already been warmed enough so as not to cause a shock to the system.
Will sharks attack each other?
Depends.
There are predatory sharks like the Great White, Tiger, and Bull Sharks which actively hunt and eat other varieties of shark. There are other species which will not actively hunt other species of sharks, but will feed on an already dead shark. However, there are sharks, like the Whale Shark which do not consume shark meat in any form, because their diet is entirely different.
What is a sharks most sensitive means of finding prey?
Even though the shark uses both its eyesight and its sense of smell to hunt prey, neither one of those senses alone would lead it to enough prey to sustain its voracious appetite. The shark's eyesight is not very keen, and even though its sense of smell is good, smells do not travel well under water. As a result, these senses do not provide the shark with enough range to effectively hunt for prey. How, then, does the shark find enough prey to satisfy its appetite? The shark has two highly developed means of searcher for prey. A shark has a very sensitive vibration detector and an even more sensitive electrical field sensor.
Hope that helps!
Unlike most fish, sharks possess skeletons made completely of cartilage. Cartilage is a softer, more flexible tissue than bone. The reason you can bend your ear or tip of your nose is because it's supported by cartilage. Most bones in our body are formed by cartilage precursors that later become calcified to form the hard skeletal tissue we know as bone. Sharks actually do form some types of calcified tissues, such as their teeth, so they do have the ability to form bone. Then why don't they form bone for their whole skeleton? Well, sharks evolved from bony ancestors so in fact they actually evolved to not produce a bony skeleton. There are several ideas why this may have occurred. One thought is that the evolution of a cartilaginous skeleton gives sharks a more flexible, maneuverable body, making them extremely well adapted for a variety of swimming modes. A flexible body is also helpful for moving around complex habitats and tucking into small spaces and crevices.
How deep down can goblin sharks be found underwater?
Goblin sharks are native to Asian waters but have been discovered else where around the world within depths far too deep for human to explore which is a depth of about 1200 metres.
Do more people get killed by sharks or iceburgs?
yes. if startled wild elephants are a danger to practily anything that moves
Which of these is NOT an aquatic reptile group?
Nodosaurs, I think. I know that Plesiosaurs and Ichithyosaurs are bothe for sure part of the aqautic reptile group. The Pterosar might be the best answer though because it is a flying reptile.
Are there a lot of sharks in Massachusetts?
IN Massachusetts? No. In the oceans NEAR Massachusetts? Yes.
What is the tiny food for big shark?
Depends on what you mean by "big Sharks". Whale Sharks and basking Sharks eat plankton and Krill.
The other "big Sharks" eat bigger stuff. fish, seals etc
What kind of family is a shark in?
Tiger shark is from the family Carcharhiniformes.It is the only member of the genus Galeocerdo.
