The ocean consist of several different layer. Each of those layers have different conditions, which enable the ocean’s inhabitant to form separate ecosystem within the ocean. Each of those separate ecosystems have different fish species that have adapted to there environments to survive in those specific ocean layers.
The first of the ocean’s layer is a sunlit surface. This layer of the ocean feature high levels of light. Due to the high level of light in this layer of the ocean, the fish in this layer are able to see their prey and predators from long distance.
Ocean Layers and How Fish Survive
Additionally, because the fish find food relatively easy in this layer, the fish in this layer tend to move quick and burn up alot of their energy. These fish also travel long distance to find there meal. The second layer of the ocean is the twilight layer, which exist between a few hundred meter below the ocean’s surface.
In this layer, the light is much dimmer than in the sunlit surface, as the light begin to fade to a permanent dusk. The fish in this layer must make a decision as to whether they will remain in the dark, or if they will travel towards the surface to find there food. Many of the fish in this layer travel towards the surface to eat the plankton that exist in the ocean during the night hours, but return to the twilight layer during the day.
Many of these fish have tiny light on their own bodies to help them remain hidden from predator that might otherwise spot them in the twilight layer. The third layer of the ocean is the midnight zone. In this layer, light dont exist.
This layer stretches thousand of meter into the ocean floor. Due to the lack of light in this part of the ocean, the fish in this layer do not use vision to find there food. Instead, they use other sense to find food, such as lure or having very large jaw to catch there food.
Their jaw are large, since food in this layer is relatively rare. The final layers of the ocean are the abyssal and hadal zone. These layers are locate at the deepest part of the ocean.
In these zone, the ocean water temperature is close to freezing, and the pressure in this layer is extremely high. The animal in this part of the ocean have soft body and relatively small body, as the larger or more muscular species of life do not easily endure the high ocean pressure. Additionally, the animal in this part of the ocean move slow, as these fish do not need to chase their prey for food, and they need to conserve there energy.
Each of the ocean’s layer lead to the development of different requirement for the survival of the fish in each part of the ocean. Layers that include light allow the fish to use there vision to move quick and find food, but also introduce competition between the species for food. In the area that are darker with less light, there is less competition for food, but there is less food that are available.
Areas with high ocean pressure have little competition for the fish, but there is little room for error. Due to the difference in each of the ocean’s layer, there is no one method that will work for all layer of the ocean. For example, a fishing lure that is effective for catching fish in the sunlit zone will not work in the midnight zone.
Additionally, a rule that a scientist create to protect the fish in the sunlit zone will not necessarily provide the same protection for the fish that live in the abyssal and hadal zones. Each of the ocean’s layer has its own set of rule and regulation, and the fish have adapted to survive within each of these separate ocean area.