Hyneria was a prehistoric predatory lobe-finned fish that lived during the Devonian period around 360 million years ago. It was approximately 4 meters in length and weighed as much as two tons. There is evidence from bones that it had very strong fins and maybe could go onto land.
In 1968, fossilized teeth, bones and a tail fin were found by Keith Thompson in the Red Hill Shale of Pennsylvania. Many specimens have been found since then, although a complete skeleton has yet to be discovered. Hyneria was just one of many species of lobe-finned fish of the family Tristichopteridae, common in the Late Devonian period, along with its close relative Eusthenopteron, whose well-preserved fossils are common and so have been intensively studied by scientists for decades.
Hyneria was featured in the BBC's television series Walking With Monsters. It featured a beached female Hyneria attempting to catch prey by sliding along the muddy ground like a walrus to catch two Hynerpeton (with the narrator explaining that it could "attack like a killer whale after a seal"). This behavior is entirely speculative, based on the fact that the fish had powerful fleshy fins, like those of a coelacanth, that could possibly have enabled it to move short distances on land (though most modern researchers consider early tetrapods and their ancestors to have been mainly aquatic).