The first time you crack open a cooked lobster and notice a bright green substance inside, it can be surprising. Many people wonder whether it’s safe to eat, a delicacy, or something that should be avoided. The green material is called tomalley, and it serves as the lobster’s digestive gland, functioning much like a combination of a liver and pancreas. It helps digest food, store nutrients, and process substances the lobster consumes.

For many seafood enthusiasts, tomalley is considered a delicacy. It has a rich, creamy texture and an intensely briny flavor that some people enjoy spreading on toast, mixing into seafood sauces, or using to enhance lobster dishes. While many chefs appreciate its unique taste, others leave it out because its strong flavor is not appealing to everyone.

Although tomalley is edible, it is also the part of the lobster where certain contaminants can accumulate. Because it filters and processes what the lobster eats, it may contain higher levels of environmental pollutants, naturally occurring toxins, or harmful compounds produced during algae blooms. As a result, several food safety agencies recommend limiting or avoiding its consumption, particularly when shellfish advisories are in effect.

If you decide to eat tomalley, it is best to buy lobster from reputable sources and waters that are regularly monitored for safety. Even then, moderation is generally advised. Many people simply remove the green substance and enjoy the sweet, tender lobster meat instead. Ultimately, whether to eat tomalley is a matter of personal preference. Understanding what it is, how it functions, and why experts sometimes recommend caution can help you make an informed decision about what’s on your plate.