Monteira filmed herself playing with the fish's mouth and lifting its upper lip to show off the uncanny gnashers. 'No, but teeth like that? Like dentures? Look here!' she quipped. Monteira then ...

He managed to hook one and, after reeling it in, was shocked to see the fish seemingly grinning at him with a "mouth full of teeth." Martin described the moment he caught the toothy fish ...

A new study shows that the ease with which these fish can develop a biological innovation (complex teeth), not just the innovation itself, enables this rapid evolution. It’s not what you do ...