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July 19, 2021

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True Nature of Sharks: Why They Have Lasted for Millions of Years

True Nature of Sharks: Why They Have Lasted for Millions of Years

Sharks are some of the oldest fish species swimming in our oceans today, so there must be a reason why these animals have been around for over 400 million years. For a species to outlast the dinosaur age and continue to thrive, they must be doing something right. 

 

Characteristics of Sharks That May have Helped Them Survive to This Day

 

1. Sharks Prey Selectively

One of the biggest misconceptions about sharks is that they hunt for humans. This is not true at all. Sharks are very selectively about their prey. They usually target those that are weak or injured. This is actually the very reason why our oceans need them. By targeting the weakest of the underwater species, sharks help strengthen their breeds. They are also key to maintaining the health of the entire marine ecosystem by preventing overpopulation, especially among small fish.

 

2. Sharks Recover Remarkably Fast Compared to Most Species

While sharks are not immune to sickness or injury, they do possess genes that seem resistant to damage. That’s why scientists have been keen on studying their DNA, to find out what makes them close to invincible. For example, in a landmark 2019 study published in the Proceedings of the National Academy of Sciences (PNAS) journal, scientists were able to map and sequence the entire genome of the