what is the coral of the lobster
I assumed, and later confirmed, it was lobster roe or lobster eggs. The lobster roe is naturally black and when cooked it turns red and is called coral (toward the bottom of the picture, the roe has turned red on the far ends and is still black in the center). Because I had asked the restaurant not to cook my lobster too long, the most outside roe had turned red and the inner roe, the majority of it, was still black.