THE EARTH BEFORE THE SHARKS Fossil evidence shows that sharks populated the planet before the dinosaurs existed, that is, more than 400 million years ago. Since the skeleton of the shark is composed of cartilage, the only thing preserved from prehistoric sharks are...
Social Structure of Sharks There isn’t much or reliable information about the social structures of sharks, given the complexity of studying their individual interactions and behavior. However, in recent years the relationships between fish once considered simple...
Shark Tails – Depending on the species Each shark has a tail adapted to its physiology, its surroundings, and its lifestyle; Therefore, there is a great diversity of types of tails. Each one consists of a precaudal pit and an upper and lower lobe. In some cases,...
Sharks don’t roam all areas of the ocean as some people fear. While it is true that occasionally they are spotted in locations that they normally wouldn’t be it has to do with their needs. For example if something is wrong in their normal habitat such as severe...
Shark Breeding The reproductive habits of sharks determined by a series of biological characteristics cause a low reproductive potential of some species. General aspects of their reproduction are slow growth and late sexual maturity, very long reproductive cycles, low...
Development of the senses of sharks Sharks owe much of their effectiveness as predators to their good sensory system. Their senses are not integrated but depend on each other to provide reliable acuity. Sharks can smell thousands of times better than any human being...
