Biblical answer:
On the fifth 'creative day', "God created the great creatures of the sea and every living thing with which the water teems and that moves about in it, according to their kinds..."(Genesis 1:20, 21)
Different Answer:
Fish evolved over billions of years. From that point, fish were and continue to be born into the waters where their parent lays eggs or gives birth.
Fish [&] sea food. . ! !Fish [&] sea food. . ! !
Sea stars are not fish so no, it is not.
Fish are ectothermic and sea squirt is not
All sea-horses are fish BUT not all fish are sea-horses.
I assume you mean "A" sea slug. No, a sea slug is not a fish, but an echidnoderm.
Sea fish don't live in rivers because rivers don't have coral or any sea plants. The sea plants are vital for some fish. That and some of the sea fish are to big for rivers.
The largest fish in the sea is the whale shark.
No, sea serpents are not fish. They are a type of snake
it is a fish
it is a fish
Sea lampreys are fish.
fish life in sea an essay