Suppose that humans blame the occurrence of mega-tsunamis and flash floods that taking nearly a million lives annually on the terrifying mermaids living in the Mariana Trench. The Secretary-General of the UN decided to use force against this intelligent species and many nations are involved in a campaign against their terrorism.
Since bullets proved useless against the mermaid in their habitat the military deploys powerful laser weapons instead. What kind of energy-based weapon is suitable at such depth? To give you an idea what we are up against the mermaid actually is in possession of a super weapon nicknamed "Rolling in the deep" which is responsible for powering the tsunamis and floods.
The mermaids can hide inside the hydrothermal vents for hours naked and their primary weapon of choice is a punch that is the equivalent of a mantis shrimp snapping and scaled up accordingly!