PORTLAND, Maine — This year’s marine heat waves and spiking ocean temperatures foretell big changes in the future for some of the largest fish in the sea, such as sharks, tunas and swordfish. The ...

Scientists have uncovered why big predators like sharks spend so much time in the ocean’s twilight zone. The answer lies with ...

If you liked this story, share it with other people. I have spent much of my life studying predatory fishes in East Africa’s coastal waters, but never have I been more concerned about their future.

Inspired by their round disc-like shape, ocean sunfish were given the nickname mola, which in Latin means “millstone”. In addition to their odd appearance and elusive behavior, ocean sunfish are known ...

On an unassuming morning off the Norwegian coast, millions of small fish called capelin began to gather in the ocean. Soon enough, they amassed to 23 million individuals, forming a group over 6 miles ...