Preparing a dead lobster
When you cook meat, the animal is usually already dead. This appears to be self-evident. As a result, cooking a dead lobster may not appear to be a problem. While this is preferable to wrangling a live lobster, it will not produce the desired results.
As a result, unless you're getting that pre-steamed fresh lobster, you'll want to avoid the dead stuff — unless it's already on your plate. You don't want to get a lobster that has already begun to decompose. Not only will it taste bad and have a weird mushy texture, but it's also bad for you. When shopping for a lobster, choose one that appears to be alive not one that appears to be on its way out.