The hammarhead shark,like all sharks,has to keep moving in order to stay alive. The hammarhead also moves quite a lot because of the way it's head is shaped. In order to see in front of them they must swing their head and they do this constantly.
people keep killing them
A hammer, or a rock if you are a caveman. Either way, keep your head out of the way.
no
It's head is hammer shaped. It does not use its head like a hammer.
they keep moving
yes
As long as you keep alot of other fish in there too, so the sharks don't go hungry
They keep the different populations of the ocean's species intact. Sharks make sure the ocean doesn't get overpopulated.
You hit it with a hammer
A plunger and a pipe wrench should be kept and a phillips head and a flat head screw driver. It is also good to have a hammer available.
Animals use pheromones because they need to find mates and they have to use their instincts to attract mates and keep away predators.