Sharks are notoriously known to be fearsome marine animals. The 1975 Hollywood blockbuster hit Jaws has given its audience the idea that sharks are wild and dangerous. Since then, biologists, scientists and marine animal enthusiasts have embarked on shark research. Because of the various research made on the study of sharks, these underwater creatures are found to have fascinating facts rooted to their physical and biological structure.
There are many incredible facts about sharks. Some are amusing, while others are down-right amazing. To set the records straight, worldwide statistics on shark attacks show about 10 deaths in a year. Truth is, though shark attacks are horrifying, the occurrences are rare. Additionally, not all sharks are dangerous to humans; out of the many shark species, about only 10 are actually aggressive.
Perhaps it is best to first put here, in order to resolve the old preconceived notion that sharks terrorized humans, that humans actually pose more danger to sharks than the other way around. Based on shark research, humans are actually a greater threat to these fascinating marine animals. Sharks are captured for their fins for exotic dishes. Such a wasteful ruthless practice because fins are only being cut off from the shark and the body would then be thrown to the sea. Sharks are in danger to overfishing given that they are long-lived with only a few offspring during their lifetime.
A sharks’ physiology is remarkable according to shark research. Sharks are fishes which don’t have bones; instead they are made of cartilage belonging to the class of rays and skates. Unlike other fishes, sharks don’t have scales. Instead, the tough skin covering the shark’s body is composed of small plates covered with enamel called dermal denticles.
Sharks have excellent senses. With their lateral line system along their sides, they can detect movements in the water. The shark can find food – even those that are hidden in the sand—and traverse within the area at night. How is this so? Beneath the skin, the shark’s lateral line system is comprised of fluid-filled passages. This liquid is vibrated by the ocean water’s pressure that is transmitted to the system.
Although sharks are fish, meaning they lay eggs, it is discovered in shark research that there are some species that give birth tot heir young live. Therefore, sharks are oviparous and viviparous.
Perhaps, due to the sharks rather terrifying teeth as depicted in the famed movie Jaws, we are predisposed that sharks are indeed without doubt dangerous. Sharks have several rows of teeth and whenever a tooth is lost, a new one replaces it. Shark’s teeth don’t have roots which is why after a week, these teeth fall out.
Unlike humans who go through deep sleep, most sharks must move constantly to make sure their gills are receiving adequate amount of oxygen. Their “sleep swimming” process consists of restful and active periods.
After having discovered all these shark research, this will eventually give us a different viewpoint on sharks. We can even help these sharks from dying in vain because of selfish human activities.