![]() Numerous light organs on their head, underside, and on the tail base. They account for much of the biomass about 65 percent of them and are responsible for the deep scattering layer of the world's ocean. Live in the depths to 300 metres at daytime and come to the surface level at night time. Let us look at some of the deep sea fish at different depths of the ocean and their special characteristics:Ĭharacteristics of Deep Sea Fish at Different Depths The zones where there is not a single trace of penetrated light called the aphotic zone are the bathypelagic and abyssopelagic zones where 75 percent of the ocean life inhabit. The abyssopelagic zone of 4000 to 6000 metres deep is the home of the deep sea fishes. The bathypelagic zone that is 1000 to 4000 metres deep is the first zone inhabited by deep-sea organisms. In this zone, light is still measurable and below this in the depths are darker. The deep sea fish can be located in various zones of the sea and for each zone, the pressure keeps rising and the oxygen levels along with the temperatures keep on declining and they adapt their bodies to such environments.īenthic organisms are the ones that live on the surface sea level the ones below its pelagic and epipelagic zone and of them, the marine species that inhabit the pelagic zone are only 2 per cent.Įven the organisms that inhabit the 200-1000 metres deep mesopelagic zone start to exhibit luminescence producing ability that is a characteristic feature of the deep ocean fish. They have hinged jaws wherein the teeth extend to the front beyond their mouth due to their large size.Ī component called rhodopsin present in the eyes helps them to see even in the dim light.ĭifferent Deep Sea Fish Representative Species Their bodies are expandable for them to be able to consume prey that is bigger than them. Some deep sea fish use their needle tooth and even their sharp fins to prey. Their luminescence organ is a unique feature that can be present anywhere in their body. The deep sea fish do not have any air sacs in their body so that they do not compress under the extreme pressure of the sea as they lay deep. The deep sea fish have the most specialized features of any species in the world that has evolved for them to adapt to extreme conditions like high pressure, the darkness of the environment and cold. The luminous organs can be present on several parts of the body of the deep ocean fish and they are often used to prey, communicate or be safe from predators and even for mating. More than a dozen families of marine fishes are mid-water species and they are distinguishable due to their enlarged eyes, enormous mouths, and the presence of luminous organs. There are many deep sea fish representative species that lie like the deep saltwater fish under the vastness of the sea level and each has some special features depending on their class or family. The mesopelagic fish and use colour to camouflage themselves from other fish. The fish also tends to develop spines as a defence mechanism except for the mesopelagic fish that usually lack defensive spines. Upon maturation, they no longer float in the buoyancy state and the weight increase makes it denser than the seawater and helps them develop hydrofoils in order to provide hydrodynamic lift, unlike other fishes which at this stage develop swimmer’s bladders. Many of them are born in the shallow waters and as they mature they sink into the depths of the sea. The eggs or larvae of the fish have oil in the plasma as they stay in a buoyancy environment in the pelagic zone at this stage. The fishes that live under the deep ends have special features for different conditions than the sea level. The depth when 200 metres and below the pressure increases and the fishes surviving in such depths of darkness are called deep sea fish. ![]() The deep sea fish thrive in areas under the ocean where even sunlight fails to reach due to its depth, which is bound to make marine biologists curious about this species. They survive in deep waters and dark surroundings under all the pressure from the water above. The aquatic bodies of the planet earth are home to so many fishes among them the deep sea fish or the deep ocean fish which are of the class Osteichthyes and they are the most intriguing and researched aquatic creatures.
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