|“||Hyneria weighs two tons, and is five meters long!||”|
Physical appearance and biology
tons. It also had powerfully jaws coupled with strong front fins that allowed Hyneria to propel itself onto land. They were able to survive on land in short intervals by using its air bladder as primitive lungs, which would have also helped them thrive in oxygen deprived waters.
Behaviour and traits
Hyneria swam in estuaries and rivers of the Late Devonian period, though it would sometimes venture onto land for food. Its prey consisted of fish like Stethacanthus and amphibians like Hynerpeton. Victims would be caught in its jaws and then, while still alive, swallowed head first. Fossils suggest that Hyneria would strand itself on the top of mudbanks where they would wait for prey.
A female attacked and killed a Stethacanthus and chased a Hynerpeton, but he escaped because of his legs, that allow him to go on land. However, the female later encountered the male Hynerpeton while it was mating and successfully killed him.