Rinse the blue crabs under cold water and scrub off any dirt
Remove the apron and lift the top shell if desired
Pat the crabs dry
Heat a large skillet over medium-high heat
Add butter or oil to the skillet
Add minced garlic, if using
Place the crabs in the skillet in a single layer
Season with salt, black pepper, and any desired spices
Saute for 5 to 8 minutes, turning once or twice
Cook until the shells turn bright red and the meat is heated through
Add lemon juice or herbs at the end, if desired
Serve immediately