Daily Mail
The fossils were found in a site in the Eastern Desert known as Ras Gharib A, roughly 200 miles from Cairo
Several different types of bony fish were found including percomorph acanthomorphs, the moonfish from the Mene genus,

deep-sea hatchetfish and a predatory species known as bonytongues
The conditions that occurred during the Paleocene-Eocene Thermal Maximum are seen as 'the best ancient analog' for the present-day warming of the planet
During the period, these fish were swimming as far north as Denmark
Several theories exist on how the fish were able to deal with the harsh PETM conditions

Researchers have discovered 56 million-year-old fish fossils in an eastern Egyptian desert that show the fish were able to exist in seas with temperatures approaching 95 degrees Fahrenheit. 

The fossils were found in dark-gray shale in a site in the Eastern Desert known as Ras Gharib A, roughly 200 miles southeast of Cairo.

They include more than 12 groups of different type of bony fish from the era, including percomorph acanthomorphs, a group that includes walleye, bass and bluegills.