The Gempylidae are a family of scombriform ray-finned fishes commonly known as snake mackerels or escolars.

They are elongated fishes with a similar appearance to barracudas, having a long dorsal fin, usually with one or finlets trailing it.

The largest species, including the snoek (Thyrsites atun), grow up to 2 m long, and the oilfish (Ruvettus pretiosus) can reach 3 m, though they rarely surpass 150 cm.

Like the barracudas, they are predators, with fang-like teeth.

[4] Trichiuridae Lepidocybium Ruvettus Epinnula Neoepinnula Nesiarchus Gempylus Thyrsitoides Rexea Thyrsites Paradiplospinus Diplospinus Nealotus Promethichthys Gempylidae are believed to have first evolved at least 20 million years after the Late Cretaceus Extinction event, potentially due to tectonic plate movements.