Today, marine fishes are conquering the oceans, but they weren’t always so successful. A new study published in Nature Communications has revealed that the ancestors of today’s marine fishes evolved from freshwater fishes, and this evolutionary transition happened more than 230 million years ago. This study shows the remarkable adaptability of fishes and their ability to survive in a wide variety of habitats. It also gives us a better understanding of how marine fishes evolved and why they are so successful today.

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source: Phys.org