In order to see with their eyes they would need some degree of light. In true complete darkness the eye doesnt work. If they use something else to "see" like heat or sensing vibration then they wouldnt need visible light.
Can fish see in the dark?
- Thread starter Mudfrog
- Start date
Lateral line and electric pulses actually help most fish who dwell in dark waters. Blind cave tetras are an example. Their eyes have been covered by a pigment as they mature. The only way that enables them to locate their areas is through the lateral line system running in their flanks. The electric pulses should be self-explanatory with elephant-nose and a few others.
Try some LED nightlights on your tank. This might give him just enough light to navigate at night. Alot of fish do their hunting at dusk and dawn when there is some visible light, but not complete darkness.
I didn't have any LED lights but I did have a tank light for a 10 gallon so I put that on top of the tank, I kept it on the right side of the tank (he usually stays on the left), I'm looking into some moon lights I just haven't justified their cost w/ shipping yet.
many fish are adapted to live in dark areas.
but some are unable to see in the dark and have other ways of "seeing".
but some are unable to see in the dark and have other ways of "seeing".
if its the 10 gallon hood that takes 2 lights i would use like an exo terra reptile night light i put it on my wolf just so i can watch him at night,last night he actually jumped outa the tank for no reason haha,but with the exo terras they simulate moon light so that would be great
and here
In fish, the lateral line is a sense organ used to detect movement and vibration in the surrounding water. Lateral lines are usually visible as faint lines running lengthwise down each side, from the vicinity of the gill covers to the base of the tail. Sometimes parts of the lateral organ are modified into electroreceptors, which are organs used to detect electrical impulses. It is possible that vertebrates such as sharks use the lateral organs to detect magnetic fields as well. Most amphibian larvae and some adult amphibians also have a lateral organ.
The Lateral line is related to the Ampullae of Lorenzini.
The receptors in the lateral line are neuromasts, each of which is composed of a group of hair cells. The hairs are surrounded by a protruding jelly-like cupula, typically 1/10 to 1/5 mm long. The hair cells and cupolas of the neuromasts are usually at the bottom of a visible pit or groove in the fish. The hair cells in the lateral line are similar to the hair cells inside the vertebrate inner ear, indicating that the lateral line and the inner ear share a common origin.
Teleosts and elasmobranchs usually have lateral-line canals, in which the neuromasts are not directly exposed to the environment, but communicate with it via canal pores. Additional neuromasts may appear individually at various locations on the body surface.
The development of the lateral-line system depends on the fish's mode of life. For instance, fish that are active swimming types tend to have more neuromasts in canals than they have on their surface, and the line will be farther away from the pectoral fins, which probably reduces the amount of "noise" that is generated by fin motion.
The lateral-line system helps the fish to avoid collisions, to orient itself in relation to water currents, and to locate prey. For instance, blind cavefish have rows of neuromasts on their heads, which appear to be used to precisely locate food without the use of sight; killifish are able to use their lateral line organ to sense the ripples made by insects struggling on the water's surface. Experiments with pollock have shown that the lateral line is also a key enabler for schooling behavior.
It has also been suggested that the lateral line may give sharks advanced warning of frontal pressure systems and that they use it to avoid severe weather conditions that may result in injury. It was observed that during Hurricane Gabrielle that struck Florida in 2001, juvenile black tip sharks moved to deeper waters as the storm approached. A student at the University of Aberdeen is using this concept as the basis of her PhD thesis.[1]
Some crustaceans and cephalopods have similar organs.
In fish, the lateral line is a sense organ used to detect movement and vibration in the surrounding water. Lateral lines are usually visible as faint lines running lengthwise down each side, from the vicinity of the gill covers to the base of the tail. Sometimes parts of the lateral organ are modified into electroreceptors, which are organs used to detect electrical impulses. It is possible that vertebrates such as sharks use the lateral organs to detect magnetic fields as well. Most amphibian larvae and some adult amphibians also have a lateral organ.
The Lateral line is related to the Ampullae of Lorenzini.
The receptors in the lateral line are neuromasts, each of which is composed of a group of hair cells. The hairs are surrounded by a protruding jelly-like cupula, typically 1/10 to 1/5 mm long. The hair cells and cupolas of the neuromasts are usually at the bottom of a visible pit or groove in the fish. The hair cells in the lateral line are similar to the hair cells inside the vertebrate inner ear, indicating that the lateral line and the inner ear share a common origin.
Teleosts and elasmobranchs usually have lateral-line canals, in which the neuromasts are not directly exposed to the environment, but communicate with it via canal pores. Additional neuromasts may appear individually at various locations on the body surface.
The development of the lateral-line system depends on the fish's mode of life. For instance, fish that are active swimming types tend to have more neuromasts in canals than they have on their surface, and the line will be farther away from the pectoral fins, which probably reduces the amount of "noise" that is generated by fin motion.
The lateral-line system helps the fish to avoid collisions, to orient itself in relation to water currents, and to locate prey. For instance, blind cavefish have rows of neuromasts on their heads, which appear to be used to precisely locate food without the use of sight; killifish are able to use their lateral line organ to sense the ripples made by insects struggling on the water's surface. Experiments with pollock have shown that the lateral line is also a key enabler for schooling behavior.
It has also been suggested that the lateral line may give sharks advanced warning of frontal pressure systems and that they use it to avoid severe weather conditions that may result in injury. It was observed that during Hurricane Gabrielle that struck Florida in 2001, juvenile black tip sharks moved to deeper waters as the storm approached. A student at the University of Aberdeen is using this concept as the basis of her PhD thesis.[1]
Some crustaceans and cephalopods have similar organs.
