Tomalley (from the Carib word ', meaning a sauce of lobster liver), crab fat, or lobster paste is the soft, green substance found in the body cavity of

lobster Lobsters are a family (Nephropidae, synonym Homaridae) of marine crustaceans. They have long bodies with muscular tails and live in crevices or burrows on the sea floor. Three of their five pairs of legs have claws, including the first pair ...

s, that fulfills the functions of both the

liver The liver is a major organ only found in vertebrates which performs many essential biological functions such as detoxification of the organism, and the synthesis of proteins and biochemicals necessary for digestion and growth. In humans, it i ...

and the

pancreas The pancreas is an organ of the digestive system and endocrine system of vertebrates. In humans, it is located in the abdomen behind the stomach and functions as a gland. The pancreas is a mixed or heterocrine gland, i.e. it has both an ...

. Tomalley corresponds to the

hepatopancreas The hepatopancreas, digestive gland or midgut gland is an organ of the digestive tract of arthropods and molluscs. It provides the functions which in mammals are provided separately by the liver and pancreas, including the production of digestive e ...

in other arthropods. It is considered a delicacy, and may be eaten alone but is often added to

sauce In cooking, a sauce is a liquid, cream, or semi-solid food, served on or used in preparing other foods. Most sauces are not normally consumed by themselves; they add flavor, moisture, and visual appeal to a dish. ''Sauce'' is a French word ...

s for flavour and as a thickening agent. The term lobster paste or lobster

pâté ''Pâté'' ( , , ) is a paste, pie or loaf filled with a forcemeat. Common forcemeats include ground meat from pork, poultry, fish or beef; fat, vegetables, herbs, spices and either wine or brandy (often cognac or armagnac). It is often served ...

can also be used to indicate a mixture of tomalley and lobster

roe Roe ( ) or hard roe is the fully ripe internal egg masses in the ovaries, or the released external egg masses, of fish and certain marine animals such as shrimp, scallop, sea urchins and squid. As a seafood, roe is used both as a cooked i ...

. Lobster bisque, lobster

stock In finance, stock (also capital stock) consists of all the Share (finance), shares by which ownership of a corporation or company is divided.Longman Business English Dictionary: "stock - ''especially AmE'' one of the shares into which owners ...

, and lobster

consommé In cooking, a consommé is a type of clear soup made from richly flavoured stock or broth that has been clarified, a process that uses egg whites to remove fat and sediment. Consommé has three English pronunciations: traditionally in the UK, ...

are made using lobster bodies (heads), often including tomalley. The hepatopancreas of a

crab Crabs are decapod crustaceans of the infraorder Brachyura, which typically have a very short projecting "tail" (abdomen) ( el, βραχύς , translit=brachys = short, / = tail), usually hidden entirely under the thorax. They live in all the ...

is also called tomalley, or crab "fat"; in crabs the tomalley is yellow or yellow-green in color. In Maryland and on the

Delmarva Peninsula The Delmarva Peninsula, or simply Delmarva, is a large peninsula and proposed state on the East Coast of the United States, occupied by the vast majority of the state of Delaware and parts of the Eastern Shore regions of Maryland and Virginia. ...

, the hepatopancreas of the

blue crab Blue crab may refer to: * Blue Crab 11, an American sailboat design * ''Callinectes sapidus ''Callinectes sapidus'' (from the Ancient Greek ,"beautiful" + , "swimmer", and Latin , "savory"), the blue crab, Atlantic blue crab, or regionally as t ...

is called the "muster" or "mustard", probably because of the yellow color, which is not the bright yellow of regular prepared yellow mustard, but closer to one of the brown mustards, such as

Dijon mustard Dijon mustard (french: Moutarde de Dijon) is a traditional mustard of France, named after the town of Dijon in Burgundy, France, which was the center of mustard making in the late Middle Ages and was granted exclusive rights in France in the 17 ...

. Particularly when eating steamed or boiled crabs, it is considered a delicacy.

Health risks

The tomalley in general can be consumed in moderation (as with the livers of other animals). It can, however, contain high levels of polychlorinated biphenyls (PCBs) which can give a number of negative health effects in large concentrations. It may also contain toxins that are associated with

paralytic shellfish poisoning Paralytic shellfish poisoning (PSP) is one of the four recognized syndromes of shellfish poisoning, which share some common features and are primarily associated with bivalve mollusks (such as mussels, clams, oysters and scallops). These shellfi ...

(

saxitoxin Saxitoxin (STX) is a potent neurotoxin and the best-known paralytic shellfish toxin (PST). Ingestion of saxitoxin by humans, usually by consumption of shellfish contaminated by toxic algal blooms, is responsible for the illness known as paralytic ...

and

gonyautoxin Gonyautoxins (GTX) are a few similar toxic molecules that are naturally produced by algae. They are part of the group of saxitoxins, a large group of neurotoxins along with a molecule that is also referred to as saxitoxin (STX), neosaxitoxin (NST ...

). Those toxins do not leach out when the lobster is cooked in boiling water. The toxins responsible for most shellfish poisonings are heat- and acid-stable, and thus are not diminished by cooking. A report from the Maine Department of Marine Resources in July 2008 indicated the presence of high levels of paralytic shellfish poisoning toxin in some tomalley from lobsters in that state. Around the same time, The Massachusetts Department of Public Health reminded consumers not to eat lobster tomalley, because this part of the lobster can build up high levels of toxins and other pollutants. The

U.S. Food and Drug Administration The United States Food and Drug Administration (FDA or US FDA) is a federal agency of the Department of Health and Human Services. The FDA is responsible for protecting and promoting public health through the control and supervision of food s ...

then issued an advisory against consuming tomalley from

American lobster The American lobster (''Homarus americanus'') is a species of lobster found on the Atlantic coast of North America, chiefly from Labrador to New Jersey. It is also known as Atlantic lobster, Canadian lobster, true lobster, northern lobster, Cana ...

found anywhere in the Atlantic Ocean. But in the same advisory the FDA stated that lobster tomalley "normally does not contain dangerous levels of PSP toxins" and that the current high toxin levels were probably "associated with an ongoing

red tide A harmful algal bloom (HAB) (or excessive algae growth) is an algal bloom that causes negative impacts to other organisms by production of natural algae-produced toxins, mechanical damage to other organisms, or by other means. HABs are sometimes ...

episode in northern New England and eastern Canada".

Health risks

See also

References

Further reading