Eggs usually fertilized in the water. The Whale shark is the largest fish in the world; the basking shark is the second largest fish.
However, as you learn their main facts, you will appreciate them for what they are. Sharks spend their entire lives in the ocean doing all they can to survive, and they have performed this task quite well.
There is a lot of information, curiosities, and relevant data about sharks available that worth knowing. Like any other fish, they rely upon their gills to allow them to breathe while underwater. Instead of surfacing to breathe, they use their gills to get oxygen from the water.
There is evidence that sharks have been on Earth for more than million years ; this means that they were dwelling the oceans when dinosaurs ruled on land.
Believe it or not, sharks can live in all oceans and often prefer the areas near the coast. Instead of bones, the skeleton of sharks is composed of cartilage, a flexible, robust and less dense substance. Shark skeleton material is not strong, dense bones like terrestrial vertebrates.
Instead, they have skeletons made of cartilage, a flexible and lighter tissue which is also considered bone but gives sharks the speed underwater and the flexibility they need to be the dominant predators they are.
This organ is the one that regulates buoyancy in many marine animals. Therefore many sharks have to swim constantly to avoid sinking. Sometimes they rest on the bottom of the ocean. These shark species, classified in 8 orders and 37 families.
They are organs that emit light, used mainly as bait to attract prey. There are some truly small species, which have a length up to 20 centimeters.
The smallest shark is the Dwarf Lantern Shark which is only about 8 inches long. The largest shark is the Whale Shark which has a length close to 35 feet.
The Whale Shark is also the largest fish alive. But when one falls, another replaces it. Shark Teeth are very Dynamic. The teeth of a shark are in consecutive long rows. When they lose one tooth, a new one from the back row come forward to fill the slot; this continues for their entire lives.
Sharks can grow more than 30, teeth in a lifetime. They can move the upper and lower jaws being one of the most potent in the world. It is so sharp that they can detect a drop of blood in the water several miles away. Apparently, this is an adaptation to salt waterinitiated from freshwater ancestors.
Sharks have amazing Adaptation capabilities. Sharks can rapidly adapt to new environments when looking for food. The Bull Sharkfor example, can live in freshwater and saltwater areas. Some Sharks have an impressive Life Span. The Spiny Dogfish Shark can live more than years; this is exceptional when you consider that the average lifespan of most species is 20 years.
Sharks are not only ferocious predators. Extensive testing shows that sharks are intelligent creatures. They have problem-solving skills. They are also very curious about their environment.
Shark brains do not have a rounded shape like human brains; they are long and narrow-shaped. Shark Infographic Click for expand While most sharks hunt alone, some species work together to catch prey or to move it to a convenient location for feeding.
Sharks sleep, but they do it with their eyes open. Only one side of the brain sleeps at a time so that they can continue the breathing cycle while they rest. Sharks have a bad reputation.Facts about Great White Sharks, Tiger Sharks, Bull Sharks, Whale Sharks, Bull Shark, Hammerhead Shark, Mako Shark and more.
Introduction to Sharks Sharks are a large group of fish that have inhabited the oceans for over million years, even before dinosaurs populated our planet. Some species of sharks have photophores.
They are organs that emit light, used mainly as bait to attract prey. Not all sharks are big. There are some truly small species, which have a length up to 20 centimeters. The smallest shark is the Dwarf Lantern Shark which is only about 8 inches long. The largest shark is the Whale Shark which has.
Many students define paragraphs in terms of length: a paragraph is a group of at least five sentences, a paragraph is half a page long, etc.
In reality, though, the unity and coherence of ideas among sentences is what constitutes a paragraph. Jan 21, · Are sharks mammals or fish? Find this information about sharks and more about whale sharks, great white sharks, basking sharks and more! Like this . All About Sharks-seven paragraphs Essay Sharks come in all different shapes and sizes.
Sharks are also known to sometimes attack people. Some of the main types of sharks are the angel sharks, saw sharks, and cow sharks. Squainiformes, or also known as. Basic Facts About Sharks.
They breathe through a series of five to seven gill slits located on either side of their bodies. All sharks have multiple rows of teeth, and while they lose teeth on a regular basis, new teeth continue to grow in and replace those they lose.