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Fish portal; Crustaceans portal; Marine life portal; Aquatic animal – Animal living mostly or entirely in water; Freshwater fish – Fish that mostly live in freshwater; Marine biology – Scientific study of organisms that live in the ocean; Saltwater fish – Fish that live all or much of their lives in seawater; World fish production
Freshwater fish are fish species that spend some or all of their lives in bodies of fresh water such as rivers, lakes, ponds and inland wetlands, where the salinity is less than 1.05%. These environments differ from marine habitats in many ways, especially the difference in levels of osmolarity .
The bucktooth tetra eats scales off other fishes. Lepidophagy, or scale-eating, has been reported in a range of fish, including: Chanda nama (family Ambassidae), [4] Plagiotremus (family Blenniidae), [5] Terapon jarbua (family Terapontidae), [1] a few Ariopsis and Neoarius species (family Ariidae), [6] Pachypterus khavalchor (family Pachypteridae), Macrorhamphoides uradoi (family ...
Parasitic infections from freshwater fish are a serious problem in some parts of the world, particularly Southeast Asia [citation needed]. Fish that spend part of their life cycle in brackish or fresh water, like salmon (an anadromous coastalfish closely related to trout), are a particular problem.
There are 95 species of freshwater fish occur in the country, where 53 of those are endemic. 41% of all known species of fish of Sri Lanka are found in freshwater. There are about 70% of endemism of those fish. Most of them are listed into IUCN categories. Four Devario species were described in 2017 by Batuwita et al. However, the taxonomy and ...
Most oceanic species (78 per cent, or 44 per cent of all fish species), live near the shoreline. These coastal fish live on or above the relatively shallow continental shelf. Only 13 per cent of all fish species live in the open ocean, off the shelf. Of these, 1 per cent are epipelagic, 5 per cent are pelagic, and 7 per cent are deep water. [16]
These coastal reefs are also visited by pelagic species of red sea fish, including some of the 44 species of shark. Approximately 40% of the Red Sea is quite shallow (under 100 m/330 ft), and about 25% is under 50 m (164 ft) deep. About 15% of the Red Sea is over 1,000 m (3,300 ft) depth that forms the deep axial trough.
Freshwater fish include a are very diverse, consisting of more than 18,000 species and making up 1/4 of the world's vertebrate species. [10] Around half of fish species live in freshwater environments, the other half living in saltwater. [11] Some fish, such as salmon and some species of shark, are able to travel between the freshwater and ...