Question: how do you reheat a cooked lobster tail?
Answer: Preheat your oven to 350 degrees Fahrenheit.
Put the lobster in a heat-proof/oven-safe dish and cover it with foil. Make sure there is liquid in the dish (the lobsters sauce, stock, or butter).
Heat in the oven until the lobster is warm. ... 
Take out of the oven and serve.