<P> The great hammerhead swings its head in broad angles over the sea floor to pick up the electrical signatures of stingrays buried in the sand . It then uses its "hammer" to pin down the stingray . </P> <Ul> <Li> <P> Pacific hagfish resting on bottom . Hagfish coat themselves and any dead fish they find with noxious slime making them inedible to other species . </P> </Li> <Li> <P> The tripodfish (Bathypterois grallator), a species of spiderfish, uses its fin extensions to "stand" on the bottom . </P> </Li> <Li> <P> Gargoyle fish </P> </Li> <Li> <P> The fringe - lipped flathead is found in estuaries and coastal bays </P> </Li> </Ul> <Li> <P> Pacific hagfish resting on bottom . Hagfish coat themselves and any dead fish they find with noxious slime making them inedible to other species . </P> </Li> <P> Pacific hagfish resting on bottom . Hagfish coat themselves and any dead fish they find with noxious slime making them inedible to other species . </P>

The number of fishermen (on x-axis) and demersal fish production (y-axis)