Did you know that there is a shark known to walk like a salamander – on the bottom of the sea and an land? The little epaulette shark (Hemiscyllium ocellatum, named after its markings) likes to walk and is even able to leave its little tidal pool on the Great Barrier Reef and crawl over the exposed reef to the next one.

Being used to low oxygen levels (at night, tidal pools cannot hold enough oxygen for all their inhabitants) the epaulette shark can survive 60 times longer without oxygen than humans can (it survived in the laboratory for an hour without any oxygen at all). In order to do this it slows its breathing and heart rate and its blood pressure falls by half. It even powers down certain parts of its brain.

Source here and here