What do you call a group of pugs?
This isn't a trick question, it's a 'grumble' of pugs (and we can see why)
A romp of otters
A prickle of porcupines...makes sense
A troubling of goldfish
...eh? They look pretty relaxed to us!
A rhumba of rattlesnakes
A sloth of bears
There's no such thing as a bear of sloths though. That would be silly.
A business of flies
This one suits those hard-working flies perfectly, doesn't it?