Deep-Sea Fish: Adaptations and Living Conditions

What are some deep-sea fish? What zones of the sea are they found in? 

Deep-sea fish include species like anglerfish, viperfish, bristlemouths, giant oarfish, deep-sea blobfish, barreleye fish, telescope fish and gulper eel. The sea is divided into multiple zones namely the sunlit/epipelagic zone (surface to 200 meters), mesopelagic zone (200-1000 meters), bathyal (1000-4000 meters), abyssal (4000-6000 meters) and Hadal (beyond 6000 meters).

What are some body adaptations seen in deep-sea fish? 

Deep-sea fish like blobfish have body adaptations like reduced or absent swim bladders and soft, jelly-like bodies with weak muscles and high water content. They also have light, flexible, porous skeletons as well as slow metabolism, growth and movement. 

What are the conditions deep-sea fish have to adapt to? 

Deep-sea fish have to adapt to extreme conditions like little to no sunlight, temperatures near 0-4°C, extreme high pressure and low food/resource availability.