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Juvenile fish are marketed as food. Whitebait is a marketing term for the fry of fish, typically between 25 and 50 millimetres long. Such juvenile fish often travel together in schools along the coast, and move into estuaries and sometimes up rivers where they can be easily caught with fine meshed fishing nets.
Fish, eels, some lobsters, blue crabs (and so forth) do have distinct juvenile habitats, whether with or without overlap with adult habitats. In terms of management, use of the nursery role hypothesis may be limiting as it excludes some potentially important nursery sites. In these cases the Effective Juvenile Habitat concept may be more useful.
The adult fish are solitary but the juvenile fish are sociable and occur in shoals. The larvae and juveniles prefer rather shallow habitats along shorelines and these smaller fish have a varied diet of aquatic and terrestrial animals [ 6 ] while the large, solitary adults prey mainly on freshwater shrimp and small fishes.
Whereas FishBase is a database about adult finfish, LarvalBase is a database about the juvenile stages of fish. Juvenile fish often feed differently and occupy different habitats than the adults do. LarvalBase complements FishBase by providing information about these early stages of life. [2]
The species is known to grow to a maximum size of 51 cm and around 1.25 kg weight. [ 6 ] The fin anatomy is highly useful for identification purposes, with the species having 11 spines in the first dorsal fin , with one spine and 16 or 18 soft rays on the second dorsal fin.
Juvenile fish form schools, but when the fish reach a length of about 7 cm (2.8 in) they begin to divide up into pairs, which may remain in the schools alongside smaller fish. Larger fish do not school and are usually found in pairs, each with a home range that overlaps that of other pairs.
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A facility that releases juvenile fish into the wild for recreational fishing or to supplement a species' natural numbers is generally referred to as a fish hatchery. Worldwide, the most important fish species used in fish farming are, in order, carp, salmon, tilapia, and catfish. [28]