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 (biology), family (Nephropidae, Synonym (taxonomy), 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 ...

s, that fulfills the functions of both the liver and the pancreas. 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 ...

in other arthropods. It is considered a delicacy, and may be eaten alone but is often added to sauces for flavour and as a thickening agent. The term lobster paste or lobster pâté can also be used to indicate a mixture of tomalley and lobster roe. Lobster bisque, lobster

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

, and lobster consommé 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 hepatopancreas of the blue crab 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. 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 ( saxitoxin and gonyautoxin). 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 then issued an advisory against consuming tomalley from

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

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 episode in northern New England and eastern Canada".

Health risks

See also

References

Further reading