Why do different fish need different types of food?
      Different types of fish have different nutritional needs. The same food is not ideal for all types of fish, or indeed for fish at all stages of their development. Baby fish need a protein rich diet that allows them to grow properly. Some types of fish need a plant rich diet while others feed more on animal foods. However it is important to remember that fish are not strict plant eaters or animal eaters. They just need more of one kind of food compared to the other.