What Should You Do If You Find Green Stuff Inside Your Lobster?

Don't panic.

If the lobster was properly handled and the substance resembles the typical soft green or yellow-green material found inside lobster bodies, it is likely tomalley.

However, before eating it, consider:

1. Where was the lobster harvested?

Check whether there are seafood advisories for that area.

2. Does the lobster smell fresh?

A strong rotten, sour, or ammonia-like odor is a warning sign.

3. Has the seafood been properly refrigerated and handled?

Temperature control is critical for seafood safety.

4. Are you in a group advised to be especially cautious with seafood?

People who are pregnant, young children, older adults, and individuals with certain health conditions may need to follow specific seafood guidance from health authorities.

5. Are you comfortable eating the tomalley?

If not, simply remove it and enjoy the lobster meat.

The Bottom Line

The strange green substance inside the lobster shown in the photograph is most likely tomalley—the lobster's hepatopancreas.

It is a normal anatomical structure and is not automatically a sign of spoilage, disease, or a parasite.

For centuries, people in various places have eaten it and considered it a delicacy. However, tomalley can accumulate environmental contaminants and marine biotoxins, so eating large amounts isn't something to approach casually. Local seafood advisories should always take priority.

So the next time you crack open a whole lobster and discover something green inside, don't immediately assume you've found something disgusting or dangerous.

You may simply be looking at one of the lobster's digestive organs.

The more important question isn't “Why is my lobster green inside?”

It's:

“Where did this lobster come from, and is there any current safety advisory for eating the tomalley?”

That answer will tell you far more about whether it's a good idea to eat it than the color alone.