Diverse sea creatures evolved to reach same swimming solution

Tuesday, April 28, 2015 - 13:20 in Biology & Nature

The ability to move one's body rapidly through water is a key to existence for many species on this blue planet of ours. The Persian carpet flatworm, the cuttlefish and the black ghost knifefish look nothing like each other - their last common ancestor lived 550 million years ago, before the Cambrian period - but a new study uses a combination of computer simulations, a robotic fish and video footage of real fish to show that all three aquatic creatures have evolved to swim with elongated fins using the same mechanical motion that optimizes their speed, helping to ensure their survival.

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