The Fish that sleeps inside pond bed

 
When ponds dry up, the fish and every living thing in it die. But the ‘Lung fish’ does not die at such a condition. It burrows into the mud and forms a capsule around it and sleeps in it – aestivation! Its metabolism slows down drastically and it can remain in this state for up to two years. When it rains and the pond gets water it releases itself from the capsule and comes out to swim in the water! It is said that it is a primitive fish and that it breathes with its lungs taking in air by swimming up to the pond’s surface. Its lungs are the modified forms of swim bladders found in other fish (that keep their buoyancy in the water). It also has a longer life span than other fish! It is really a wonder fish.