Nukunuku (snout) and ‘oi’oi (sharp) describe the fish’s narrow, elongated mouth. Together, it loosely translates as “long-snout fish shaped like a wiliwili leaf.” There are two species ...

Early jawless fish were likely to have used bony projections surrounding their mouths to modify their mouth shape while ...

The fish’s body is considered “elongated” and “compressed,” researchers said, with a “moderately large” head and “blunt” snout. It has a “horse-shoe shaped” mouth facing ...

These fish, whose elongated bodies earned them their name ... to absorb oxygen directly from air by gulping it in through its mouth. This adaptation enables snakeheads to thrive in low-oxygen ...