subject: Some Unknown Facts About Sharks [print this page] Sharks are most likely one of the most recognized fish varieties in the world. Nevertheless, most people know very little of the many facts associated with this sea marvel. While this underwater species is well recognized for their engaging biology, there are certain, hitherto unrevealed facts that make the shark genuinely interesting.
Not lots of people know that sharks are cartilaginous fish. The term 'cartilaginous' refers to those animals whose body is made up of cartilages instead of bones. Along with the entire body, the fins too are made up of cartilages. This does not permit the sharks to fold their fins along side their body as is the situation with bony fishes.
Like anti acne solutions, sharks too exist in more than just one manifestation. But of course, it's only a select ones like the Clearpores Skin Cleansing System that stand out. This fish exist in over four hundred species. Sharks exist in various shapes, sizes, and colors too. Whale, which is the largest fish in the world, is also a variety of shark. While whale is the largest shark, the smallest one is dwarf lanternshark. This fish is just 6 to 8 inches long.
Did you know that shark has teeth replacements? Shark has rows of teeth arranged in its mouth. So, when teeth fall out, the replacements move in to occupy the space of the fallen teeth. This frequently occurs within one day of the falling of teeth. Sharks have five to fifteen rows of teeth in each jaw, which gives them sufficient substitutes for their teeth.
Though every shark reproduces via internal fertilization, different shark species have diverse reproduction patterns. Some species reproduce by giving birth to young ones and a few just lays eggs. It has been observed that like humans, some shark species also have a placenta, that facilities in giving birth to young ones.
Sharks have always been portrayed as vicious man eaters by Hollywood movies as well as other media. They have been considered responsible for many of the deaths of humans at sea. However, this is not completely true and sharks are relatively safer species as compared to some other undersea creatures. In fact, only 10 of the 400 odd shark species are considered to be deadly. And, they commonly just attack when they feel a threat. Although sharks cannot be labeled as 'man-eaters'; they do have very sharp teeth that may inflict mortal wounds, nevertheless.
Sharks are also, one of the longest living species in the world. Although the precise life expectancy of a shark is not yet known; on an average, the largest of the species is anticipated to live for upto 100-150 years. The smaller shark varieties normally have a life expectancy of about 25- 30 years.
So, hopefully the given lesser known facts have updated your knowledge bank about sharks.
