It is a universal certainty that sharks are the largest animals in the whole wide world. Being the largest creatures on earth there are certain unbelievable characteristics these sea monsters possess that will definitely blow your mind. Below are five of such captivating characters of sharks.
1. Sharks Do Not Have Bones
The whale sharks can grow up to12.2 meters and weigh up to 40 tons but as gigantic as they are they don't have bones.
According to wikipedia.org, sharks are "elasmobranch" group of fish which are made up of cartilaginous skeleton. A very vivid description of what cartilaginous skeleton looks like is the clear gristly tissues your ear and nose are made of.
This cartilaginous skeleton is lighter and softer than bones but as sharks grow old they deposit calcium salts in their skeletal cartilage to reinforce it. That is why the tried jaw of a shark can be as strong as a bone.
2. Sharks Can Go Into Trance
Call it daydreaming, coma, or dream, the truth is that when you roll a shark upside down it goes into trance, a state known as tonic immobility. At this state, they become completely inactive. That is the reason why most times scientists flip sharks upside down when they are working on them in the water.
3. Shark Skin Feels Like Sandpaper
Unlike most fishes, the skin of sharks feels just like sandpaper. This is so because the skin is made up of tiny-teeth like structures called placoid scales otherwise known as dermal denticles. This makes their skin to resemble a leather basketball.
These tiny structures are however pointed toward the tail to help prevent friction during swimming in the water.
4. Sharks Have Sharp Eyesight
Most sharks can see very clearly in dark areas. They have fantastic night visions that them to see colors even in the dark.
At the back of their eyeballs is a reflective layer of tissue known as tapetum which helps them to see very well with little light.
5. Sharks Have Special Electroreceptor Organs
Near the nose, eye, and mouth of sharks are small black spots. These spots according to Colin/Southwest fisheries science center, are known as ampullae lorenzini, special electroreceptor organs that allow the shark to detect electromagnetic fields and temperature shifts in the ocean.
What else do you know about sharks? Please share you knowledge with us in the comments section below and also share this post with others.
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