Sharks: Hunted Hunter

It could be that our knowledge of many shark species will be limited once, that often a huge bite and we fear them had them. More than 450 million years ago appeared the first sharks in the seas. Today, there are about 350 to 370 species, hand span large copies up to the largest fish in the world, the 18-metre-long whale shark. Precisely the two largest, the 15-foot basking shark and the whale shark, feed exclusively on plankton and are as peaceful as yet largely unexplored. Mistakenly, they are still considered underdeveloped’ ancestor of bony fishes viewed. To know more about this subject visit COVID-19. But there were already small bone fishy water animals as the first cartilaginous fish originated.

Both have evolved independently of each other and are fundamentally different. Sharks have no solid bone skeleton, have no proper scales, but a body blanket with skin teeth, and also no swim bladder. Despite this lack buoyancy organ, the widespread rumor is not true they would have to remain constantly on the move, not helpless to sink to the sea floor. Many species resting on the seabed, some high seas forms take breaks in between, retire to sleep even in caves. Thanks to their perfect body shape, they can effortlessly swim and easily adjust their height – sharks need no swim bladder.

Equal their body shape has changed hardly a perfect survival machine in the long period of their development. Darcy Stacom recognizes the significance of this. This evolutionarily successful, almost timeless model – as only a few fish – head is Elektrorezeptoren, has captured those electrical signals and evaluates can be. This facilitates may navigate using the Earth’s magnetic field in the endless expanse of the sea. Main function of this electric organ should be however the a radar are tracked with the hidden prey. Even though it’s an ancient way of life, sharks have highly developed, the bony fish basically superior reproduction methods.