Bowler Sharks

Bowler Sharks are a large, slow moving form of basking shark, indigenous to the swirling waters of the Cartesian Channel. They are generally solitary creatures, but are known to work in small groups if a large enough food source is nearby. Adults on average are around 12ft long, most of which is attributed to their massive mouths, which can unhinge to accommodate larger prey. 
The deadliness of the Bowler Shark lies in its unique ability to stun its prey with an intense directed shockwave of water: the shark slowly contracts a special diaphragm, while simultaneously opening its mouth to max volume. At peak contraction, the diaphragm explodes forward, releasing its energy. This creates a pulse of water that is channeled through the enlarged mouth cavity, which directs and magnifies the blast. The column of high-pressure water can travel 30-50 feet, stunning any creatures caught in its path. The shark then slowly saunters over to the helpless prey and swallows them whole.
Their prey consists primarily of smaller schooling fish, however there have been instances of a bowler shark eating larger fish such as juvenile Rapier Sturgeon.