Ancient Volcanic Eruptions Shaped Modern Shark Evolution

New research reveals how underwater volcanic activity 93 million years ago led to significant adaptations in shark physiology, aiding their transition from bottom dwellers to open-water predators.

Underwater volcanic eruptions increased ocean temperatures and carbon dioxide levels, driving shark evolution.
Sharks developed elongated pectoral fins, enhancing their swimming efficiency and aiding their adaptation to open waters.
Researchers measured over 500 living and fossilized shark species to document these evolutionary changes.
The study highlights the complexity of predicting marine life responses to current rapid climate changes.
Only about 13% of modern sharks are swift open-water predators, with most still inhabiting the ocean floor.