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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.
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.
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.
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.
Snapper is known by multiple names, including tāmure, a word to describe adults, and karatī, a word describing juvenile fish. [11] There are numerous traditional ways to prepare the fish. One specific to snapper was kaniwha, where the meat would be submerged in fresh water and squeezed numerous times, then eaten raw.
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 .
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Lutjanus sebae is a predatory fish which feeds on different fish, benthic crustaceans and cephalopods. It aggregates into schools with similar sized individuals or they will be solitary. This is a slow growing species, off the Seychelles, the mean age of first sexual maturity for both males and females was estimated at 9 year old.