Top 5 Oldest Animal Species On Earth

Thursday - 20 December, 2017

Evolution of animals merely depends upon environmental conditions of Earth. When digging down the history of Earth, we can see some animal species manage to thrive upon THE different geological time span of Earth, developed before million of years ago. Here the list of top 5 oldest animal species on Earth.

5 Horseshoe Crab – 445 million years old

Horseshoe crabs were originated on Earth before 445 million years ago. They live in shallow ocean waters across the world. Horseshoe crabs have a hard exoskelton, long tail and spines. They have nine eyes in total, found throughout the body. Out of nine two large eyes are mainly used by horseshoe crabs and others are light receptors to control the movements. They also can sense ultra violet rays.

4 Nautilus – 500 million years old

Nautilus is a marine mollusk that originated 500 million years ago. That is long before Dinosaurs roaming on Earth. It is estimated that Nautilus is the only surviving member of the large group of shellfish. Nautilus is found in tropical water of Andaman, Fiji and Great Barrier Reef, The live under depth of 2200 feet of ocean. Nautilus also described as living fossil. Nautilus body has many chambered shells. These shells make them look like octopuses. The mouth of Nautilus surrounded by 100 tentacles and have a muscular hood on shells. It will help nautilus to fight against predators.

3 Jelly Fish – 550 Million years old

The umbrella like headed jellyfish can be found in every oceans in the world. Jellyfishes are the oldest multi-organ animals in the world. The evolved in world oceans 550 million years ago. They have no brain and nervous system. Jellyfishes are found in different shapes and color. The 90 percentage of their body contain water. They are also known for eating other jellies. Box jellyfish of the family is the most venomous species on Earth. Their tentacles have more than 5000 stinging cells.

2 Sponge – 580 million years old

Sponges are a special kind of marine animal that look like a plant. They appeared on world oceans before 580 million years ago. There are 5000 different species of sponges in the world. They live in colonies in different depth of the oceans. Sponges don’t have any internal organs, arms or head. They have a special power to restore the lost body part and new sponge will grow from old one. The body of sponges contains many canals, becomes shelter for many small aquatic animal species.

1 Cyanobacteria – 2.8 billion years old

Cyanobacterias are the oldest known living system in the world. They originated 2.8 billion years ago and the first ever microbe to produce oxygen via photosynthesis. In that way they became a part of converting Earth’s atmosphere into an oxidizing one. Cyanobacterias are also known as green-clue bacteria. The unicellular cyanobacterias reproduce through microfission.

Wednesday - 17 January, 2018
10 shortest living animals in the world

Change in metabolism, brain to body ratio, environment, and many other unknown factors determine the lifespan of animals. Some animals live for 150 years, and some others only live for few hours. Check out the list of 10 shortest living animals in the world.

Wednesday - 17 January, 2018
Top 10 Most Aggressive Animals In The World

Strength alone cannot determine the danger one animal can cause. Because temperament of is a significant factor too.Not all animals quickly turn into rage. But some do. Here the list of 10 most aggressive animals in the world.

Wednesday - 17 January, 2018
Top 10 Most Powerful Animal Bites

Do you know what the maximum force a human bite could exert? Note more than 160 pounds per inch (psi). You may feel a little pain or your skin may break by a human bite. The question is, what’s it like to be bitten by an animal that has 10 or 20 times more powerful

Wednesday - 17 January, 2018
Top 10 Strongest Animals In The World

Which is stronger, an African bush elephant or a dung beetle? Of course, African elephants are the largest animals on Earth. But considering the strength to weight ratio, many small animals are much stronger than large animals. Here, the list of 10 strongest animals in

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