Here we’ll give you a list of 43 species of fish you can find living in the ocean, both in coastal waters, out in open waters, and in deep sea. By detecting and responding to a certain fixed frequency of light flashes, however, a lantern fish may find a mate more easily.As mentioned above, the ocean contains an incredible amount of life. Light-producing organs are commonly found in species inhabiting the darkest regions of the sea, where the dark water can present a problem when trying to find a mate. Recognition and warning are two other possible functions of the flashing lights. Many smaller organisms such as krill and copepods are attracted to sources of light and, by responding to the flashes of a lantern fish, unwittingly offer themselves as a meal. The lantern fish is able to control the intensity and frequency of its flashing lights, and it is likely that the intermittent flashing serves a dual purpose. By retreating to the gloomy depths during the day, they may also reduce the risk of predation from larger species. Lantern fish also take advantage of the fact that they are not alone in harvesting the plankton other small species such as amphipods and krill are also consumed at such times. One explanation for this behavior is that vast quantities of tiny plankton rise to the surface of the ocean at night species that feed on this rich food source, such as the lantern fish, therefore gain from having a condensed source of food at such times. Living at depths of 655 –3,280 ft (200 –1,000 m), these species undergo nightly migrations to the surface to feed, descending once again to the depths during the day. They are commonly found in large schools. Most are small fish, measuring from 0.8-10.4 in (2-15 cm) in length.
Lantern fish (family Myctophidae) are one of the most important groups of midwater fishes, with some 230 –250 species known.
The eyes themselves are large with large lenses and pupils and highly sensitive retinas, suggesting that vision is an important sense for these species. Some species even have light organs on their tails the purpose of these is probably to act as false lures to potential predators. The former organs give off a twinkling effect as the animals swim, while the latter are far more powerful, effectively lighting up the area immediately ahead of the fish.
#Lantern fish reproduction series#
In addition to a series of rows of light-producing organs along their sides (the pattern and number of which varies according to species), some lantern fish, such as those of the genus Diaphus, also have larger organs both in front of and underneath the eyes, rather like a miner ’s lamp. Each light organ, known as a photophore, is connected to the animal ’s nervous system which, perhaps together with some form of hormonal control, dictates the flashing sequence of these organs. Lantern fish are so called on account of the special light-producing organs that are found in their skin. Some of these species, such as lantern fish, have even developed their own artificial means of generating light. Some species of fish that live in the darker reaches of the oceans also rely on light for survival. At the simplest level, it provides one of the basic requirements for photosynthesis and promotes development of a food chain. Light plays a vital role in the life of all oceans.
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