Known also as tomalley, the substance acts as the liver and pancreas of the lobster.
From the dallasnews.com
If serving boiled crab or lobster, add a little tomalley, the soft yellow or green matter inside the shell.
From the heraldtribune.com
Dump the green-yellow tomalley into a bowl.
From the sfgate.com
If there is green tomalley or red roe, set it aside.
From the orlandosentinel.com
Stir in the reserved tomalley and roe, if any.
From the orlandosentinel.com
Discard the tomalley, stomach, and lungs.
From the toledoblade.com
Lobsters possess a green hepatopancreas, called the tomalley by chefs, which functions as the animal's liver and pancreas.
From the en.wikipedia.org
Break the top shell off the crab, reserving and refrigerating the yellowish tomalley inside the shell to use in the gumbo.
From the sfgate.com
When the roux is pecan-color, reduce heat to low and add the onions, celery, bell peppers and reserved crab tomalley from the Seafood Stock recipe.
From the sfgate.com
More examples
Edible greenish substance in boiled lobster
Tomalley (alternative spelling: "tomale") or lobster paste is the soft, green substance found in the body cavity of lobsters, that fulfils the functions of both the liver and the pancreas. Tomalley corresponds to the hepatopancreas in other arthropods. ...
The hepatopancreas of a crustacean
The liver of the lobster. Considered a delicacy. It is greenish in color and has a very unique flavor.
Green-cloured liver of a lobster
Green-colored liver used to flavour spreads and sauces.