It never fails to amaze me how 'fish eating' birds can pull off the impossible and swallow outrageous specimens! Like this Common Carp being casually tossed to it's doom by a Cormorant on Christmas eve at Venus Pool!
It's all a matter of stifling any 'fight' and then aligning the catch....
A stretchy gape and oesophagus plus willpower are all that's needed!