Staff at Chicago's Shedd Aquarium have reared a special kind of fish known as a warty frogfish for the first time in captivity. Their success may hold broader lessons for raising marine species.

Just a few paces from the front entrance to Cascadia Elementary School, dozens of baby salmon dart around in a large, bubbling tank. But for a class of 28 second-graders down the hall, a cartoon ...

Fish are not my idea of a pet. You can’t stroke fish, cuddle fish, or really interact with fish like you can with, say, a puppy . Yet fish are novelties to millions of kids, and big business to the ...