
This article is about raw fish or shellfish. It includes
marinate
Marinating is the process of soaking foods in a seasoned, often acidic, liquid before cooking. The origin of the word alludes to the use of brine (''aqua marina'' or sea water) in the pickling process, which led to the technique of adding flavor ...
d raw fish (soaked in a seasoned liquid) and raw fish which is lightly
cured such as
gravlax
Gravlax () or graved salmon is a Nordic dish consisting of salmon that is cured using a mix of salt and sugar, and either dill or sprucetwigs placed on top, and may occasionally be cold-smoked afterwards. Gravlax is usually served as an appet ...
, but not fish which is fully cured (fermented,
pickled
Pickling is the process of preserving or extending the shelf life of food by either anaerobic fermentation in brine or immersion in vinegar. The pickling procedure typically affects the food's texture and flavor. The resulting food is called ...
, smoked or otherwise preserved).
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Raw fish dishes
Health concerns
Parasite
Parasitism is a Symbiosis, close relationship between species, where one organism, the parasite, lives on or inside another organism, the Host (biology), host, causing it some harm, and is Adaptation, adapted structurally to this way of lif ...
s in fish are a natural occurrence and common. Though not a health concern in thoroughly cooked fish, parasites are a concern when consumers eat raw or lightly preserved fish such as
sashimi
is a Japanese delicacy consisting of fresh raw fish or meat sliced into thin pieces and often eaten with soy sauce.
Origin
The word ''sashimi'' means "pierced body", i.e. " 刺身" = ''sashimi'', where 刺 し = ''sashi'' (pierced, stu ...
,
sushi
is a Japanese dish of prepared , usually with some sugar and salt, accompanied by a variety of , such as seafood, often raw, and vegetables. Styles of sushi and its presentation vary widely, but the one key ingredient is "sushi rice," also ...
,
ceviche
Ceviche () is a Peruvian dish typically made from fresh raw fish cured in fresh citrus juices, most commonly lime or lemon. It is also spiced with '' ají'', chili peppers or other seasonings, and julienned red onions, salt, and cilantro are ...
, and
gravlax
Gravlax () or graved salmon is a Nordic dish consisting of salmon that is cured using a mix of salt and sugar, and either dill or sprucetwigs placed on top, and may occasionally be cold-smoked afterwards. Gravlax is usually served as an appet ...
. The popularity of such
raw fish dishes makes it important for consumers to be aware of this risk. Raw fish should be frozen to an internal temperature of −20 °C (−4 °F) for at least 7 days to kill parasites. It is important to be aware that home freezers may not be cold enough to kill parasites.
Traditionally, fish that live all or part of their lives in
fresh water
Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. Although the term specifically excludes seawater and brackish water, it does incl ...
were considered unsuitable for sashimi due to the possibility of parasites (see
sashimi
is a Japanese delicacy consisting of fresh raw fish or meat sliced into thin pieces and often eaten with soy sauce.
Origin
The word ''sashimi'' means "pierced body", i.e. " 刺身" = ''sashimi'', where 刺 し = ''sashi'' (pierced, stu ...
article). Parasitic infections from freshwater fish are a serious problem in some parts of the world, particularly
Southeast Asia
Southeast Asia, also spelled South East Asia and South-East Asia, and also known as Southeastern Asia, South-eastern Asia or SEA, is the geographical United Nations geoscheme for Asia#South-eastern Asia, south-eastern region of Asia, consistin ...
. Fish that spend part of their life cycle in
brackish
Brackish water, sometimes termed brack water, is water occurring in a natural environment that has more salinity than freshwater, but not as much as seawater. It may result from mixing seawater (salt water) and fresh water together, as in estuari ...
or freshwater, like salmon are a particular problem. A study in
Seattle, Washington
Seattle ( ) is a port, seaport city on the West Coast of the United States. It is the county seat, seat of King County, Washington, King County, Washington (state), Washington. With a 2020 population of 737,015, it is the largest city in bo ...
showed that 100% of wild salmon had roundworm larvae capable of infecting people. In the same study farm raised salmon did not have any roundworm larvae.
Parasite
Parasitism is a Symbiosis, close relationship between species, where one organism, the parasite, lives on or inside another organism, the Host (biology), host, causing it some harm, and is Adaptation, adapted structurally to this way of lif ...
infection by raw fish is rare in the developed world (fewer than 40 cases per year in the U.S.), and involves mainly three kinds of parasites:
Clonorchis sinensis
''Clonorchis sinensis'', the Chinese liver fluke, is a liver fluke belonging to the class Trematoda, phylum Platyhelminthes. It infects fish-eating mammals, including humans. In humans, it infects the common bile duct and gall bladder, feeding ...
(a trematode/fluke),
Anisakis
''Anisakis'' (a·nuh·saa·keez)
is a genus of parasitic nematodes that have life cycles involving fish and marine mammals. They are infective to humans and cause anisakiasis. People who produce immunoglobulin E in response to this parasit ...
(a nematode/roundworm) and
Diphyllobothrium
''Diphyllobothrium'' is a genus of tapeworms which can cause diphyllobothriasis in humans through consumption of raw or undercooked fish. The principal species causing diphyllobothriasis is ''D. latum'', known as the broad or fish tapeworm, or ...
(a cestode/tapeworm). Infection risk of anisakis is particularly higher in fishes which may live in a river such as salmon (''sake'') in
Salmonidae
Salmonidae is a family of ray-finned fish that constitutes the only currently extant family in the order Salmoniformes . It includes salmon (both Atlantic and Pacific species), trout (both ocean-going and landlocked), chars, freshwater whitefish ...
or mackerel (''saba''). Such parasite infections can generally be avoided by boiling, burning, preserving in salt or vinegar, or freezing overnight. In Japan it is common to eat raw salmon and ikura, but these foods are frozen overnight prior to eating to prevent infections from parasites, particularly anisakis.
See also
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Eating live seafood
The practice of eating live seafood, such as fish, crab, oysters, baby shrimp, or baby octopus, is widespread.
Oysters are typically eaten live. The view that oysters are acceptable to eat, even by strict ethical criteria, has notably been propo ...
*
Lomi salmon
*
List of fish dishes
This is a list of notable fish dishes. In culinary and fishery contexts, fish includes shellfish, such as molluscs, crustaceans and echinoderms. Fish has been an important source of protein for humans throughout recorded history.
Fish dishes
...
*
List of seafood dishes
This is a list of notable seafood dishes. Seafood dishes are food dishes which use seafood (fish, shellfish or seaweed) as primary ingredients, and are ready to be served or eaten with any needed preparation or cooking completed. Many fish o ...
References
{{Lists of prepared foods
Fish, Raw