WTF is This?!?

We get these bugs at work.....I think they are called "Water Scorpions"....they catch fish or frogs, latch onto them, stick their probiscus in and start pumping them with stomach fluids which in turn turns them into mush, and they suck it out.
I have never seen one fly, so I don't know how they get into the workshop.
I work permenant arvo shift.
Reckon they ugly or what?