You cook crabs in the trinidadian way b cooking it for about 5 to 10 minutes.
Approx. 4 years.
You cook them in boiling salt water for 5 minutes and then cool under running water.
being that they are cooked when processed, you can reheat crab legs by steaming them for 8 to ten minutes depending on size and the amount you are cooking.
No more that 2 days and it must be frozen up to 1/2 hour after death.