Historians believe that crab was one of the earliest foods enjoyed by coastal populations. Archaeologists have uncovered the remains of crab and other edible marine animals along the Eritrean coast. Additional archaeological discoveries from the Chesapeake Bay area suggest that crab was also among the most popular foods for Native Americans and early colonists.
Crab meat has many of the same nutrients as other popular types of seafood but with lower levels of mercury than marlin, swordfish, grouper, and tuna.
Crab is more than a popular item on a seafood menu; it also offers us a number of impressive health benefits, which may include its potential ability to increase cognition, protect the heart, reduce inflammation, strengthen bones, boost the immune system, stimulate circulation, and detoxify the body.

Kerala's love for sea food is as legendary as the mouthwatering variety of sea food dishes available in the state.majority of the people in kera relish sea food.There are several regional variations in styles of cooking and choice of fishes, which has made Kerala a paradise for sea food lovers.
Here am presenting kerala style fried coconut crab curry.

Ingredients

For grinding

Coconut- 1/2 cup
Cloves -3
Cardamom- 3
Cinammon -3
Fennel -1/2teaspoon
Cumin -1/2tea spoon
Shallots -4
Garlic -3
Ginger -2 small piece 
Coc oil- 1 tea spoon
turmeric- 1/4 tea spoon
Coriander powder-3 table spoon
Chilli powder -1 table spoon
Pepper -1/2 tea spoon
Curry leaves
Water -¼ cup
Turn on the flame and in a pan add coconut,cloves, cardamom, cinnamon and roast well.Then add fennel, cumin, shallots and garlic and ginger.Add some coconut oil after add turmeric, coriander powder, chilli powder and pepper.roast well till it turns golden brown colour.At last add some curry leaves.Turn of the flame and allow to cool.Then grind the fried coconut adding some water.

For roasting
Coconut oil -3 table spoon
Onion- 2 (medium size)
Green chilli -2
Tomato -1 big
Crab- 1/2 kilograms
Water- 2cups

Heat coconut oil and then add onion, saute till it gets golden brown colour.
Then add green chilli and tomato.. saute well till it become juicy.Then add crab  in it add salt mix well.
Close the lid and let it cook in low flame.after 2 minutes Add 2 Cups of water , close and cook.
When crab cooked well add the grinded coconut mixture.let it boil well
At last add some curry leaves and coriander leaves preferably.

Serve it in a bowl  with chappati,kerala style pathiri,rice etc..
 Have a good time.....