Exactly how they use their saw after the prey has been located has been debated, and some scholarship on the subject has been based on speculations rather than real observations.[5][79] In 2012 it was shown that there are three primary techniques, informally called “saw in water”, “saw on substrate” and “pin”.[79] If a prey item such as a fish is located in the open water, the sawfish uses the first method, making a rapid swipe at the prey with its saw to incapacitate it. It is then brought to the seabed and eaten.[5][60][79] The “saw on substrate” is similar, but used on prey at the seabed.[5][79] The saw is highly streamlined and when swiped it causes very little water movement.[82] The final method involves pinning the prey against the seabed with the underside of the saw, in a manner similar to that seen in guitarfish.[5][79] The “pin” is also used to manipulate the position of the prey, allowing fish to be swallowed head-first and thus without engaging any possible fin spines.
That is a Sea Rapier Unicorn
https://m.youtube.com/watch?v=sTK84oQoOHU
also you forgot the Sea Chainsaw Unicorn
https://en.m.wikipedia.org/wiki/Sawfish