Herring in the context of "Forage fish"

Boulogne-sur-Mer (French: [bulɔɲ syʁ mɛʁ] ; Picard: Boulonne-su-Mér; Dutch: Bonen; Latin: Gesoriacum or Bononia), often called just Boulogne (UK: /bʊˈlɔɪn/, US: /buːˈloʊn, buːˈlɔɪn/), is a port city in Northern France. It is a sub-prefecture of the department of Pas-de-Calais. Boulogne lies on the Côte d'Opale, a touristic stretch of French coast on the English Channel between Calais and Normandy, and the most visited location in the region after the Lille conurbation. Boulogne is its department's second-largest city after Calais, and the 183rd-largest in France. It is also the country's largest fishing port, specialising in herring.

Boulogne is an ancient town and was the main Roman port for trade and communication with its Province of Britain. After a period of Germanic presence following the collapse of the Empire, Boulogne was integrated into the County of Boulogne of the Kingdom of France during the Middle Ages. It was occupied by the Kingdom of England numerous times due to conflict between the two nations. In 1805 it was a staging area for Napoleon's troops for several months during his planned invasion of the United Kingdom.

Uracil (/ˈjʊərəsɪl/) (symbol U or Ura) is one of the four nucleotide bases in the nucleic acid RNA. The others are adenine (A), cytosine (C), and guanine (G). In RNA, uracil binds to adenine via two hydrogen bonds. In DNA, the uracil nucleobase is replaced by thymine (T). Uracil is a demethylated form of thymine.

Uracil is a common and naturally occurring pyrimidine derivative. The name "uracil" was coined in 1885 by the German chemist Robert Behrend, who was attempting to synthesize derivatives of uric acid. Originally discovered in 1900 by Alberto Ascoli, it was isolated by hydrolysis of yeast nuclein; it was also found in bovine thymus and spleen, herring sperm, and wheat germ. It is a planar, unsaturated compound that has the ability to absorb light.

The salmon shark (Lamna ditropis) is a species of mackerel shark found in the northern Pacific ocean. Similar to other mackerel sharks, salmon sharks have a thunniform body type. As an apex predator, the salmon shark feeds on salmon, squid, sablefish, birds, walleye pollock, and herring. Salmon sharks get their name from their diet, which primarily consists of salmon. It is known for its ability to maintain stomach temperature (homeothermy), which is unusual among fish. This shark has not been demonstrated to maintain a constant body temperature. It is also known for an unexplained variability in the sex ratio between eastern and western populations in the northern Pacific.

Vitamin D deficiency or hypovitaminosis D is a vitamin D level that is below normal. It most commonly occurs in people when they have inadequate exposure to sunlight, particularly sunlight with adequate ultraviolet B rays (UVB). Vitamin D deficiency can also be caused by inadequate nutritional intake of vitamin D; disorders that limit vitamin D absorption; and disorders that impair the conversion of vitamin D to active metabolites, including certain liver, kidney, and hereditary disorders. Deficiency impairs bone mineralization, leading to bone-softening diseases, such as rickets in children. It can also worsen osteomalacia and osteoporosis in adults, increasing the risk of bone fractures. Muscle weakness is also a common symptom of vitamin D deficiency, further increasing the risk of falls and bone fractures in adults. Vitamin D deficiency is associated with the development of schizophrenia.

Vitamin D can be synthesized in the skin under exposure to UVB from sunlight. Oily fish, such as salmon, herring, and mackerel, are also sources of vitamin D, as are mushrooms. Milk is often fortified with vitamin D; sometimes bread, juices, and other dairy products are fortified with vitamin D. Many multivitamins contain vitamin D in different amounts.

Skagen (Danish: [ˈskɛˀjn̩]) is the northernmost town in Denmark, on the east coast of the Skagen Odde peninsula in the far north of Jutland, part of Frederikshavn Municipality in Nordjylland, 41 kilometres (25 mi) north of Frederikshavn and 108 kilometres (67 mi) northeast of Aalborg. The Port of Skagen is Denmark's main fishing port and it also has a thriving tourist industry, attracting 2 million people annually.

The name was applied originally to the peninsula but it now also refers to the town. The settlement began during the Middle Ages as a fishing village, renowned for its herring industry. Thanks to its seascapes, fishermen and evening light, towards the end of the 19th century it became popular with a group of impressionist artists now known as the Skagen Painters. In 1879, the Skagen Fishermen's Association was established with the purpose of facilitating the local fishing industry through the Skagensbanen railway, which opened as a narrow-gauged railway in 1890. The modern port of Skagen opened on 20 November 1907, and with the railway connections to Frederikshavn and the rest of Denmark, tourism began to develop.

Clupeiformes /ˈkluːpiːɪfɔːrmiːz/ is the order of ray-finned fish that includes the herring family, Clupeidae, and the anchovy family, Engraulidae and sardines. The group includes many of the most important forage and food fish.

Clupeiformes are physostomes, which means that their gas bladder has a pneumatic duct connecting it to the gut. They typically lack a lateral line, but still have the eyes, fins and scales that are common to most fish, though not all fish have these attributes. They are generally silvery fish with streamlined, spindle-shaped bodies, and they often school. Most species eat plankton which they filter from the water with their gill rakers.

Sardine and pilchard are common names for various species of small, oily forage fish in the herring suborder Clupeoidei. The term "sardine" was first used in English during the early 15th century; a somewhat dubious etymology says it comes from the Italian island of Sardinia, around which sardines were once supposedly abundant.

The terms "sardine" and "pilchard" are not precise, and what is meant depends on the region. The United Kingdom's Sea Fish Industry Authority, for example, classifies sardines as young pilchards. One criterion suggests fish shorter in length than 15 cm (6 in) are sardines, and larger fish are pilchards. The FAO/WHO Codex standard for canned sardines cites 21 species that may be classed as sardines. FishBase, a database of information about fish, calls at least six species pilchards, over a dozen just sardines, and many more with the two basic names qualified by various adjectives.

The ilish (Tenualosa ilisha) (Bengali: ইলিশ, romanized: iliś), also known as the ilishi, hilsa, hilsa herring or hilsa shad, is a species of fish related to the herring, in the family Clupeidae. It is a very popular and sought-after food in the Bengal region, and is the national fish of Bangladesh and state fish of the Indian state of West Bengal.

As of 2023, 97% of the world's total ilish supply originates in Bangladesh. The fish contributes about 12% of the total fish production and about 1.15% of GDP in Bangladesh. On 6 August 2017, Department of Patents, Designs and Trademarks under the Ministry of Industries declared ilish as a Geographical Indication of Bangladesh. About 450,000 people are directly involved in the catching of the fish as a large part of their livelihood; around four to five million people are indirectly involved with the trade.