Underwater Creature

These animals have evolved to survive the extreme pressure the sub-photic zones. The pressure increases by about one atmosphere every ten meters. To cope with the pressure, many fish are rather small, usually not exceeding 25 cm in length. Also, scientists have discovered that the deeper these creatures live, the more gelatinous their flesh and more minimal their skeletal structure. These creatures have also eliminated all excess cavities that would collapse under the pressure, such as swim bladders.
Lack light
The lack light requires creatures to have special adaptations to find food, avoid predators, and find mates. Most animals have very large eyes with retinas constructed only cones, which increases sensitivity. Many animals have also developed large feelers to replace peripheral vision. To be able to reproduce, many these fish have evolved to be hermaphroditic, eliminating the need to find a mate. Many creatures have also developed very strong senses smell to detect the chemicals released by mates.