Hearty meal

After waiting for several hours for his prey to come close enough, a crocodile finally makes his move. At last he catches his prize - in one bite, he can bring two tonnes of pressure to bear on every inch of his prey's flesh. Rather than fend off other crocodiles interested in his kill, he welcomes them to his feast. He's unable to dine alone: his teeth may be formidable but they are grippers not carvers, so together the crocodiles perform twisting death rolls to rip the flesh into bite-sized chunks. A crocodile's stomach can hold over 25 kilos of meat, so to help him digest the cache before it begins to rot, the crocodile has a unique heart adaptation - two aortas: a feature no other animal has. By closing his right aorta, the main blood supply to his body, and opening up his left aorta, he can divert the carbon dioxide-rich blood accumulated during his underwater stakeout, directly to his stomach. The acidic blood produces 10 times more stomach acid to help digest the huge chunks of meat. The potent solution is then converted into fat and stored for the lean times ahead.

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