Very tiny fish called fry when they are first born will absorb their yolk sac, and then will need small amounts of tiny food such as brine shrimp. As they get bigger, and their mouths (and stomachs!) grow, you will be able to feed them the same food as your older fish.
Fish do not take care of their young. Young fish hatch and swim away. Some become food for larger fish ( feeder fish) and others escape to grow up.
Different species of fish need different foods and find/capture their food in many different ways.
Gourami
they teach their young how to climb and hunt for food. so when they are older they can do it then.
The general term for a young fish is a fingerling.
They mainly eat fish as adults. The young too eat fish but also invertabraes
If you start eating healthy when you are young then you will get your taste buds immune to the taste instead of when you are older when your taste buds haven't tasted the food over all your years of age. It won't taste good after you put the food in your mouth.
formula if they are very young, dog food if they are a bit older
They are an R-Strategist which means that they make many young for a higher chance of survival but don't take care of their young. BA
Fish can be fed fish food or artificially created food. This is different from natural food which is made from natural ingredients.
Fish eat all sorts of different foods from plant matter to other fish.
Different types of different populations obtain their food in a variety of ways. Fish for example swim to catch their food.