Novak Radzinsky was played by Adam Scott in Piranha 3D.
He is one of the seismologists who discover the underground lake in Lake Victoria. He has to witness the death of his two colleagues, but manages to capture one of the prehistoric piranhas together with the sheriff.
After that he also helps the sheriff in saving her family, but is later attacked and instantly killed by an adult piranha. It is implied, he was devoured after that.