Discovering the Green Stuff in the Head of a Lobster

The green substance found within a lobster's head, known as tomalley, is a fascinating and often misunderstood part of this popular shellfish. This article aims to provide a comprehensive guide to understanding what tomalley is, where it comes from, and how to prepare it safely and enjoyably.

What is Tomalley (Tomally)?

Tomalley is the greenish substance located in the head of a lobster. It is technically the lobster's liver, and it plays a crucial role in the lobster's digestive system and immune function. The presence of tomalley is one of the key indicators that a lobster has been kept in a tank for a long time before being prepared for sale, as it is often cleared out.

The Tomalley's Role and Function

The primary function of the tomalley is to assist in the breakdown and processing of foods. Since lobsters are scavengers, their diet can vary widely, and as a result, their tomalley can contain varying levels of toxins. Depending on the lobster's habitat, diet, and the season, the tomalley may contain high levels of PCBs and toxins associated with paralytic shellfish poisoning. However, as long as the tomalley is thoroughly cooked, the risks of consuming these toxins are significantly reduced.

Safety and Preparation

Despite the potential risks, many chefs and food enthusiasts consider tomalley a prized delicacy, comparable to foie gras. Its texture and flavor are often described as rich and creamy, making it a valuable addition to various dishes. If you choose to consume or use tomalley, it is important to handle it with care. It should be carefully extracted to avoid mixing it with other parts of the head, which can be gritty and less palatable.

Topical Uses and Culinary Applications

Tomalley is not only edible but also versatile. Many chefs use it to add depth and flavor to their dishes. For instance, it can be incorporated into sauces like Thermidor sauce, where its rich taste can elevate the overall quality of the dish. Some chefs also make a special lobster liver sauce, which is highly prized for its luxurious and creamy texture.

Conclusion

While tomalley, or the green substance within a lobster's head, is primarily the liver, its presence and the way it is handled can alter the culinary experience significantly. Understanding the nature of tomalley, its function, and how to prepare it safely can transform your lobster dish into a gourmet delight. If you decide to include it in your cooking, remember to always prioritize safety and enjoyment.

Note: While tomalley is edible and can be quite flavorful, it is advisable to proceed with caution due to the potential presence of toxins. Cooking it thoroughly is recommended to minimize any risks.