Epaulette shark

Halmahera's epaulette shark is a species of walking shark found only in the Halmahera and West Papua region, one of several closely related species that evolved the ability to locomote on land as an adaptation to intertidal reef flat foraging. Using their muscular pectoral fins as proto-limbs, they haul themselves between tide pools to pursue stranded prey, tolerating hypoxic conditions that would kill most fish. Scientists believe the walking shark lineages of eastern Indonesia represent one of the most recent examples of vertebrate locomotion evolution; genetic work published in 2020 identified four distinct species, all found only in remote Indonesian waters. Their docile temperament and shallow habitat make them a top sighting for divers and snorkellers alike.