This dude is very popular in Japanese sushi store.
Flying fish are ray-finned fish with highly modified pectoral fins. Despite their name, flying fish aren’t capable of powered flight. Instead they propel themselves out of the water at speeds of more than 35 miles (56 kilometers) an hour. Once in the air, their rigid “wings” allow them to glide for up to 650 feet (200 meters). The winglike pectoral fins are primarily for gliding—the fish hold the fins flat at their sides when swimming. Their streamlined bodies reduce drag when the fish are “flying.”
Another interesting characteristic of the flying fish is its unevenly forked tail, which has a top lobe that’s shorter than the bottom lobe. Flying fish can be up to 18 inches (45 centimeters) long, but average 7 to 12 inches (17 to 30 centimeters).