Hyneria was a lobe-finned fish, it had a solid bony skeleton, stout muscular fins and was covered in large scales. It aslo had powerful jaws and sharp teeth, and could swim fast making it a deadly predator. It used keen eyesight and an acute sence of smell to detect prey, such as large fish and even primitive amphibians, such as Hynerpeton. This fish was also 13ft long and was able to attack like a killer whale