Flying fish, for example, deploy their fins to glide above the water, while mudskippers use their fins like legs to walk on land. "We like to pick up where the biologists and zoologists have left off, ...

Peer into any fishbowl, and you’ll see that pet goldfish and guppies have nimble fins. With a few flicks of these appendages, aquarium swimmers can turn in circles, dive deep down or even bob to the ...