| fisheries |
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| fish types |
| demersal fish |
| bottom feeder |
| groundfish |
| whitefish |
| oily fish |
| rough fish |
| eatible fish |
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| fishing |
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A demersal fish is a fish that feeds on or near the bottom of the ocean or a deep lake in the demersal zone. For the fishing industry and the practice of fishing see Fishing. A bottom feeder is an Aquatic animal that feeds on or near the bottom of a body of water Groundfish are Fish that live on in or near the bottom of the body of water they inhabit This article is about demersal fish for more definitions see Whitefish. Oily fish, oil-rich fish or pelagic fish are those Fish which have oils throughout the Fillet and in the belly cavity around the Rough fish (or the slang trash fish) is a term used by US state agencies and anglers to describe less desirable Fish within a region or country For the computer security term see Phishing. Fishing is the activity of catching Fish. Fish are aquatic Vertebrate animals that are typically ectothermic (previously Cold-blooded) covered with scales, and equipped with two An ocean (from Greek, ''Okeanos'' (Oceanus) is a major body of saline water, and a principal component of the Hydrosphere. A lake (from Latin lacus) is a Terrain feature (or Physical feature) a body of Liquid on the surface of a world that is localized to the The demersal zone is the part of the Sea or Ocean (or deep Lake) comprising the Water column that is near to (and is significantly affected Demersal fish are also known as bottom feeders or groundfish, and may be contrasted with pelagic fish. A bottom feeder is an Aquatic animal that feeds on or near the bottom of a body of water Groundfish are Fish that live on in or near the bottom of the body of water they inhabit Any water in the sea that is not close to the bottom is in the pelagic zone.
Examples include some species of catfish, such as the members of the genus Corydoras, cod, haddock, whiting, halibut, perch, snapper, eel, grouper, bream, bass, flounder, plaice, sole, and demersal shark. Catfish ( order Siluriformes) are a very diverse group of bony Fish. A genus (plural genera from Γένος Latin genus "descent family type gender" is a low-level Taxonomic Members of the South American Corydoras Genus are Freshwater Temperate and Tropical Catfish in the armored catfish Cod is the common name for the Genus Gadus of Fish, belonging to the family Gadidae, and is also used in the common name of a variety The haddock or offshore hake is a marine Fish distributed on both sides of the North Atlantic. A halibut is a type of Flatfish Perca is the genus of fish referred to as perch or sometimes yellow perch, a group of freshwater Fish belonging to the family Percidae True eels ( Anguilliformes) are an order of Fish, which consists of four suborders 19 families 110 Genera and approximately 600 For other meanings see Grouper (disambiguation. Groupers are Fish of any of a number of genera in the subfamily Epinephelinae of Bream is a general term for a number of species of Freshwater and marine Fish, mainly but not exhaustively drawn from the genera Bass (ˈbæs is a name shared by many different species of popular Gamefish. Flounder (rarely fluke) are Flatfish that live in ocean waters ie The PLAICE, or FLASH-PLAICE, is a powerful Open source hardware device combining a Flash memory programmer, In-circuit emulation, Sharks ( Superorder Selachimorpha) are a type of Fish with a full cartilaginous Skeleton and a highly streamlined body Compared to pelagic fish, they contain little oil (1 to 4%).
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Biological trends
Bottom feeders are not necessarily detrivores, although there are many that are. Detritivores, also known as detritus feeders or saprophages, are Heterotrophs that obtain Nutrients by consuming Detritus (decomposing Some bottom feeders graze along the bottom, feeding on plant material. Other bottom feeders may feed on other bottom feeders, and thus are carnivores. A carnivore (ˈkɑrnɪvɔər meaning 'meat eater' ( Latin carne meaning 'flesh' and vorare meaning 'to devour' is any animal with a diet consisting
Some demersal fish are capable of burying themselves, such as flatfish or stingray. The flatfish are an order ( Pleuronectiformes) of Ray-finned fish, also called the Heterosomata sometimes classified as a suborder of Perciformes Dasyatidae is a family of rays, cartilaginous marine Fishes related to Skates and Sharks Dasyatids are common in tropical As with other bottom feeders, a mechanism to deal with substrate is often necessary. With demersal fish the sand is usually pumped out of the mouth through the gill slit. Most demersal fish exhibit a flat ventral region so as to more easily rest their body on the substrate. The exception may be the flatfish, which are laterally depressed but lie on their sides. Also, many exhibit what is termed an "inferior" mouth, which means that the mouth is pointed downwards; this is beneficial as their food is often going to be below them in the substrate. Those bottom feeders with upward-pointing mouths, such as stargazers, tend to seize swimming prey. The stargazers are a family Uranoscopidae of Perciform Fish that have eyes on top of their heads (thus the name
Regulations
Saltwater groundfish harvesting is subject to numerous federal regulations in the United States, principally 50 CFR 679, dealing with fishing in Alaskan waters.
Freshwater groundfish harvesting is not subject to federal regulation per se (certain species may be subject to other rules), perhaps because there are fewer true groundfish species that live in fresh water.
See also
External links
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