Osaka Metropolitan University researchers have uncovered a daily mating capacity for medaka, providing important insights into the relationship between the cost of gamete production and sexual selection.

There is a new mouth to feed in the coastal waters of the Northwest where juvenile salmon first enter the ocean, and it’s a hungry one. Over the last two decades large numbers of juvenile sablefish have spread into coastal waters from central Oregon north to northern Washington. New research published in the journal Marine and Coastal Fisheries shows the new competition follows the warming of ocean temperatures off the West Coast. It matches reports of fishing boats catching more small sablefish closer to shore.

A new species of black, slender moray eel has chosen the road less traveled, thriving in dim and muddy river mouths, unlike most of its marine relatives. It is found across the Central Indo-Pacific, including within the cave of the Puerto Princesa Subterranean River. This new moray eel is named after the underworld god Hades for its distinctive habitat, unique behaviors, and most notably, its deep, dark coloration. The study was published in the open access journal ZooKeys.

A new study by Tel Aviv University and Ben-Gurion University of the Negev reveals groundbreaking findings about the famous Rujm el-Hiri site (known as the "Wheel of Ghosts") in the Golan Heights. Based on geomagnetic analysis and tectonic reconstruction, the researchers determined that geodynamic movement over 150 million years, at an average rate of 8–15 mm per year, caused significant shifts in the ground, rotating and reorienting it over millennia. This finding challenges the widely held theory that the structure was used as an astronomical observatory, as the original alignment of the walls and entrances does not correspond to celestial observations, as previously hypothesized.