First things first, you'll want to make sure your crabs are fresh and clean. Give them a good rinse under cold water, and then it's time to get boiling. A large pot with a heavy bottom is a must, as it will help to distribute the heat evenly.
Now, here's where things get a little tricky. The boiling time will vary depending on the type of crab you're cooking. For example, Dungeness crabs will take around 8-10 minutes to cook, while blue crabs will take more like 5-7 minutes. And if you're feeling fancy, you can even try your hand at cooking king crabs!
But wait, there's more! You'll also want to consider the size of your crabs. Larger crabs will take longer to cook, obviously, but it's not just a matter of adding a few extra minutes. You'll want to make sure they're fully submerged in water, with plenty of seasoning and spices to go around.