The Uncertain Web

Colophon

The animal on the cover of The Uncertain Web is the Oriental flying gurnard (Dactyloptena orientalis). This bottom-dwelling saltwater fish takes its name from the Old French word “gurnard,” meaning to grunt; this refers to a distinctive croaking sound it makes when taken out of the water, produced by a muscle that thumps against its swim bladder. Other names include sea robin and helmet gurnard, an allusion to its wide, square head.

Found in the Indo-Pacific region, from East Africa to Polynesia, Australia, and New Zealand, flying gurnard typically inhabit shallow waters, including estuaries, coastal bays, and sandy areas. Most measure between 20 and 40 centimeters (8 and 16 inches) in length, with a brownish-colored body that tapers from head to tail.

Its most remarkable feature is its massive rounded pectoral fins, which resemble wings. They are usually held against the body, but when threatened, the fish spreads them out to the side, causing it to appear much larger to its enemies. The fins are tinged with bright blue markings and sport dark spots that resemble eyes, which serve to further confuse potential predators such as sea breams and mackerel.

In spite of its name, the flying gurnard is not actually capable of flying. Rather, it uses its pelvic fins to “walk” along the ocean floor in search of food. Its diet includes bivalves, crustaceans, and small, bony fish.

Many of the animals on O’Reilly covers are endangered; all of them are important to the world. To learn more ...