Grass is eaten by a snail, the snail is then eaten by the rat, and finally the rat is eaten by a snake ... by sea lions who are then eaten by sharks! There are lots of different food chains ...

The public have been asked to stay away from Ōmaha Beach after a venomous yellow-bellied sea snake was found alive in the dunes. A live yellow-bellied sea snake has been found in the sand dunes ...