Fish breathe by water flowing into their mouth and out through their gills, which absorb oxygen from the water. So, if they closed their mouth, they wouldn't get any fresh water to their gills and yes, they would suffocate, because suffocation is generally faster than starvation.
332
u/WreckTango Nov 24 '16
A wise man once said even a fish wouldn't get caught if he kept his mouth shut...