Chinstrap penguins are decreasing in numbers due to a lack of krill, their only food source.

The Penn State University scientist was known for her work on fish’s perception of pain.

Sharks and rays can get entangled in abandoned fishing gear, leading to injuries or death.

Canadian officials are investigating the deaths and implementing regulations to reduce the number of ships that strike the endangered species or snag them in fishing gear.

A study of 686 fish and invertebrates predicts that some animals will have to shift more than 1,000 kilometers to stay within tolerable temperatures.

Bigger, older mothers produce disproportionately more eggs than their smaller counterparts do.

The adaptation gives better endurance to the Bajau people, known as sea nomads, by increasing spleen size and, in turn, boosting the number of oxygenated red blood cells when diving.  

Trained spotters haven’t seen any newborns, suggesting trouble for the animal’s overall survival.

The variation may help explain why stocked salmon don’t fare as well in the ocean.