Dead dolphins found in the spill zone had lung abnormalities, too.
Whales are still not safe from a deafening barrage of noise created by the US Navy. And chances are, it’s happening right off your back porch.
There are fewer than 100 vaquitas left, and it's all due to the illegal poaching of a fish that lives in the same waters.
Plans for oil and gas exploration are a death sentence for the world's smallest and rarest dolphin.
Ukraine relinquished control of its "fleet" of militarized dolphins, trained to spot mines and defend ships from enemies in the water.
Hundreds of ancient marine mammal fossils point to four mass strandings in the same place.