Sharks have adapted to their marine environments in a number of ways, including the development of sophisticated gills, allowing them to remain underwater without having to come up for air, and a streamlined body with fins, enabling rapid and efficient movement beneath the waves. They are also well adapted as predators, with many razor sharp teeth that grow back almost instantaneously when lost.Continue Reading
Sharks' skin is also particularly tough, protected by an array of sharp and continually replenished scales known as dermal denticles. In addition to offering sharks protection, their skin also facilitates rapid and stealthy movement through the water.
Sharks' jaws are not attached to their skulls via bone, an adaptation which allows sharks to push their jaws out from their heads in order to suck in prey.
Sharks are also highly specialized for sensory perception, able to detect the electrical signals of their prey with organs known as ampullae of Lorenzini. They can also track prey by using the highly sensitive vibration detectors running the length of their bodies.
Great white sharks are known for their white bellies, contrasted by their dark backs. Known as "countershading," this adaptation serves as camouflage, making it hard for other fish to differentiate the sharks from sunlight when below, or the seabed when above.Learn more about Sharks
There are approximately 470 known species of shark in the world, but it's impossible to count the exact number of individual sharks on the planet. World Wildlife Fund estimates that more than 100 million sharks are killed each year for their fins.Full Answer >
There is no way to accurately count the number of remaining sharks as there are more than 400 known species of shark spread out all around the world. However, what researchers do know is that an estimated 100 million sharks are killed each year which exceeds what the different species need to recover.Full Answer >
Some disease symptoms for a pet fish are inflamed skin, drooping or chewed-on fins, a film of mucus over the body, and rapidly beating gills, according to Tetra. These are symptoms of the fish having an infestation of flukes, which are tiny flatworms.Full Answer >
The great white shark is endangered from years of being hunted by people for its fins and teeth. Great white sharks also get overhunted as trophies in sport fishing, according to the World Wildlife Fund. Another danger is accidental catching by commercial fisheries.Full Answer >