New research by the University of Plymouth has found more than 200 measures to protect sharks and rays across the 22 coastal states of the Mediterranean region. However, while elasmobranchs have made it onto many policy agendas, the study found considerable differences in how effectively any legislation was being monitored with no single source for tracking progress in the conservation and management of sharks at national levels.

By performing single-cell transcriptome sequencing of the zebrafish olfactory epithelium, we revealed the heterogeneity of zebrafish olfactory epithelial cell types and the molecular organization of key components in signal transduction of different olfactory sensory neuron subtypes, and characterized the cell population changes and transcriptional changes associated with exposure to alarm substances.

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.