The hatchetfish (Sternoptychidae) is a deep-sea dweller that lives thousands of feet under the surface. This fish uses to attract its prey, as well as avoid being eaten. Additionally, the hatchetfish’s body is said to look like a hatchet since it’s very lateral and compressed: think of the thorax being the blade and the caudal peduncle (where the fish’s body ends and the tail begins) being the handle.
Deep Sea Hatchetfish by WOES Elementary on Prezi
The deep sea Hatchetfish gets its name from the shape of its body. They are most well known for their extremely thin bodies which really do resemble the blade of a hatchet. Most of the smaller hatchetfish species are covered in delicate silvery scales. Hatchetfishes have large, tubular eyes that pointing upward. This enables them to search for food falling from the above. Because there is very little light at the great depths at which they are found, their eyes have become extremely sensitive to light and are good at distinguishing shadows against the extremely faint illumination from above.
Deep Sea Hatchetfish by Ash Eaton on Prezi
Hatchetfishes are one of the many deep sea creatures that have the ability to create their own light through a process known as bioluminescence. These fish have special light-producing organs known as photophores that run along the length of their body. These photophores produce light by means of a chemical reaction similar to that of the land-based firefly. Since these light organs point downward, it is believed they are used to hide the fish from predators through the process of counterillumination. This means that they can adjust the intensity of their underside lights to make them nearly invisible against the faint light above.
Nov 30, 2016 - Deep Sea Hatchetfish Argyropelecus gigas
The deep sea hatchetfish gets its name from the distinct hatchet-like shape of its body. It is a member of the Sternoptychidae family of deep sea fishes. There are about 45 individual species of hatchetfish that vary in size from one to six inches. They are most well known for their extremely thin bodies which really do resemble the blade of a hatchet. They should not be confused with the freshwater hatchetfish commonly seen in home aquariums.Not much is known about the life cycle of hatchetfishes. Most researchers agree that they have a short life span of no longer than a year. It is believed that they migrate to shallower waters at night to feed mainly on plankton and tiny fish. They hunt by looking for the silhouettes of their prey moving overhead. At day break, they return to the blackness of the deep ocean. Most of their reproductive habits are a mystery, although it is known that the juveniles look much different that the adults. Hatchetfishes are found in most temperate waters of the world where they are found at depths ranging from 600 feet (180 meters) to 4,500 feet (1,370 meters).