A Fish is a fan created minecraft mob.
Fish are aquatic mobs that are always passive. They can spawn in different species, such as clownfish, salmon, goldfish, royal gammas and rarely puffer fish. They drop their species, which can then be eaten, each giving a different effect on the player.
Fish will spawn in any water source bigger than 2x2. They will swim around aimlessly unless the player attacks them. They are very weak, having only 1 heart of health. They are good for tanks and decoration, as they don't serve much purpose except for food.