how do they kill jaws in jaws 3
Jaws 3-D Hearing the shark has been lured into the pipe, Michael and Kay go down to repair the underwater tunnel, so the technicians can restore air pressure and drain the water. Calvin orders the pump to be shut down to suffocate the shark, but this act instead allows her to break free from the pipe and attack Michael and Kay, but they are saved by the dolphins. They make their way back to the control room, but the shark appears in front of the window and smashes through the glass, flooding the room and killing a technician. Michael notices FitzRoyce's corpse still in the shark's throat with a grenade, and uses a bent pole to pull its pin, triggering the grenade's explosion and killing the shark. In the aftermath, Mike and Kay celebrate with the dolphins, who survived their brush with the shark.
Gill slit Most sharks and rays have five pairs of gill slits, but a few species have 6 or 7 pairs. Shark gill slits lie in a row behind the head. The anterior edge of a gill slit is motile, moving outward to allow water to exit, but closing to prevent reverse flow. A modified slit, called a spiracle, lies just behind the eye, which assists the shark with taking in water during respiration and plays a major role in bottomâ€“dwelling sharks. Spiracles are reduced or missing in active pelagic sharks.[1] While the shark is moving, water passes through the mouth and over the gills in a process known as "ram ventilation"[2]. While at rest, most sharks pump water over their gills to ensure a constant supply of oxygenated water. A small number of species have lost the ability to pump water through their gills and must swim without rest. These species are obligate ram ventilators and would presumably asphyxiate if unable to move. Obligate ram ventilation is also true of some pelagic bony fish species.[3]