Goans love their fish curry and why shouldn't they. Beautiful fish heads marinated in a thick paste of onions, coconut, garlic and chilli are cooked till soft and served on a bed of rice.

The fish can also breathe air, allowing them to survive for several days out of water if their skin stays moist.

The invasive northern snakehead, which has recently been appearing in Missouri and other states, must be eradicated, officials say.