Biotic factor are the living organisms and their actions and biproducts that contribute to the environment. There are many biotic factors that contribute to the ocean biome. For example, if a shark population goes extinct, a seal population increases causing a fish population to decrease. Biotic factors are extremely important to an ecosystem. They basicaly determine success in a community of organisms. Plants contribute too. They determine the ammount of oxygen in the ocean. The ocean has the largest biodiversity out of all the biomes in the world. Here are some organisms that contribute to this ecosystem