nope, no matter what they just couldn't do it
7 squirrels could kill a reasonably large dog though
How many goldfish would it take to kill a shark, is this even possible?
have they even got teeth?
it might not be a number thing but instinct, they probs couldnt be arsed and would just swim off, i think the only way they could is if you had a massive tank and chucked a million of them in with a shark so there was no space and the shark suffocated. probably not as fun to watch though as a group of domestic cats drinking stella kicking the shit out of 3 badgers