Why did God create creatures such as fishes if we are not supposed to eat meat and fish?

How would you feel if I say that the purpose of creating humans is to supply food to the tigers, lions, man-eating carnivores in the forest? Why don’t you allow tigers and lions to freely come in and raid villages and towns for their food? The purpose of a soul getting the birth of a fish, bird or animal is to punish the soul for its bad deeds in it’s the past births. These creatures lead a hand to mouth existence. They do not store anything for the future. Thus the soul gets a training to reduce its selfish behavior. A sinner who grabs the wealth of others and goes on storing it for selfish purposes is born as a creature such as a fish. By leading the life of a creature such as a fish, which does not store food even for the next day, the soul learns to be less selfish.

Punishment is only meant for change. Thus the births of creatures like fishes have an important significance in the spiritual progress of a soul. God is the teacher who is responsible for all these souls, which are His students. When the students commit an error, it is His responsibility to make the student realize the mistake and correct it. If you view God in this angle, you will understand God as the kindest teacher. A sinner, who stores wealth and does not donate to others, gets the birth of a plant or tree. The plant or tree stores the excess earned food in the form of fruits and is forcibly made to donate these fruits to other living beings. Thus a soul in a tree is forced to learn sacrifice, which is the most essential part of the spiritual effort. Thus God is leading all the souls towards the highest spiritual goal. If you understand this real purpose, you will not dream of eating those poor living beings. Would you kill your classmate who is learning?

The whole world is a single classroom. The teacher is Guru Datta, meaning the Lord who has given Himself to this world in the form of a teacher. Even in a green plant, a soul exists and therefore it should not be cut. In order to teach this lesson, the Lord came in human forms like Buddha and Mahavira and preached non-violence as the highest duty of a human being. The Hindu Dharma Shastra (Manu Smriti) also condemns killing of other creatures (Ahimsaa paramodharmah).