The population of gray whales migrating along the North American Pacific Coast has dropped to levels not seen since the 1970s, according to a new report.

Continued low calf count indicates that reproduction remains depressed. The eastern North Pacific population of gray whales ...

The most recent data from NOAA shows a major decline in gray whale populations compared to a year ago. Here's what to know.

Orcas in the North Pacific have been seen "massaging" each other - rubbing pieces of kelp between their bodies. Using drones, ...