Introducing this divine Matsya Yantra. Matsya, the divine fish, is the 1st of the 10 avatars of Sri Maha Vishnu. This is his story:

The people on Earth had become irreligious and disorderly in the way they lived their lives. This is when the Gods collectively decided to flood the planet and prepare it for the process of renovation. Lord Brahma, the creator, had been given the guidelines to remodel the earth by Lord Vishnu. These guidelines were the Vedas, the four principal books of Hinduism. Lord Brahma decided to rest before this grand task. The horse-headed demon, Hayagriva (not to be confused with Lord Hayagriva, the avatar of Vishnu who is considered as a symbol of wisdom and knowledge) came out of Brahma’s nose and stole the Vedas from him. Then Hayagriva went and hid himself deep in the oceans of the earth. Meanwhile, a pious king named Satyavrata (later known as Manu) who was a great admirer of Lord Vishnu, regularly worshipped Lord Vishnu and wished to meet Him. So Lord Vishnu decided to pay a visit to Manu. 
Manu was washing his hands in a river when a little fish swam into his hands and pleaded with him to save its life. He put it in a jar, which it soon outgrew. He then moved it to a tank, a river, and then finally the ocean. The fish outgrew every water body he was placed in. After growing to a massive size, the fish finally revealed himself to be Vishnu and warned Manu that a deluge would occur within seven days that would destroy all life. Therefore, the fish instructed Satyavrata to build an ark to take “all medicinal herbs, all the varieties of seeds, and accompanied by the seven saints”  along with the serpent Vasuki and other animals. As the time of the flood approached, Manu’s ark was complete. As the flood swept over the land, Matsya killed Hayagriva and returned the Vedas to Brahma. Then he tied himself to Manu’s ark using Vasuki as a rope and protected them from the storm and the floods. When the storms ended and the water subsided, Matsya left Manu and the others in the Himalayas, where they could begin human civilization again.

This yantra represents Matsya Avatar in the form of an intricate geometric pattern. It is full of spiritual energy, making it ideal for pooja. Buy now, from Giri UK.