Answer: When many lobsters turn black during/after cooking, I tend to think that they were improperly cooked. When the internal temperature during cooking doesn’t reach a certain level, the enzyme ‘phenoloxidase’ can get activated, resulting in the deposition of melanin, or black pigment.

If you have a female lobster, you’ll see red balls inside a cooked lobster. These are immature eggs called roe and are naturally black. If the eggs are black and not red when you are ready to eat your lobster, that means the lobster needs to be cooked further.

When the internal temperature during cooking doesn’t reach a certain level, the enzyme ‘phenoloxidase’ can get activated, resulting in the deposition of melanin, or black pigment. The blackening can affect only part of the lobster, or almost the entire inside of the animal.

Overcooking the Meat Most inexperienced cooks leave lobsters in the pot for far too long, resulting in dry, rubbery meat. Lobster meat is fully cooked when it reaches 140º.

Some varieties of fish and shellfish, including lobsters, contain higher-than-normal levels of those protein-digesting enzymes. Death triggers the enzyme, and freezing slows but doesn’t inactivate it, so you’re most likely to experience mushy lobster with frozen tails.

Lobsters and other shellfish have harmful bacteria naturally present in their flesh. Once the lobster is dead, these bacteria can rapidly multiply and release toxins that may not be destroyed by cooking. You therefore minimise the chance of food poisoning by cooking the lobster alive.

A few important factors contribute to the steep prices. Unlike with most fisheries, there aren’t any commercial farms to cheaply provide a lot of lobsters. Lobster farming is difficult: The crustaceans grow slowly, eat a lot, and are susceptible to a very contagious disease, and their eggs are difficult to raise.