Five decades ago, a single description of the rare sailback houndshark was recorded. The pregnant shark, captured by a fisherman, was small with a wide mouth, short snout, large eyes, and a dorsal fin ...

It's Shark Week, and Mammoth Cave took the unofficial holiday to announce the discovery of another new shark species. Mammoth Cave announced the discovery of the "Macadens olsoni" Thursday. The fossil ...

Scientists have recorded the first known footage of a sleeper shark in Antarctic waters, marking a rare sighting.

A new species of ancient shark has been discovered at Mammoth Cave National Park in Kentucky, officials said. Named Macadens olsoni, the fossils were found in the Ste. Genevieve Formation, dating back ...

Italian naturalist, Camilo Ranzani's original 1840 illustration of Carcharhinus porosus, known as the smalltail shark, taken from the Center For Biological Diversity's suit filed in Feb. 2025 against ...