Sharks are a sign of aggression and fear. With widely open jaws, they represent a tendency to eat up anything they meant. One may think logo to be too much horrible, but it is not so.
If you are in the market to create a cut throat competition and want to proceed by surpassing your competitors, then do use a shark logo.
In this way, your business would leave an impact that you have to offer something more unique which has the power to change the world. In case your business is into equipment making, then a shark logo remains the best idea.