Paris (AFP) Feb 18, 2022

When marine researchers started recording sounds in the seagrass meadows of the Mediterranean Sea they picked up a mysterious sound, like the croak of a frog, that resounded within the dense foliage – and nowhere else.

“We recorded over 30 seagrasses and it was always there and no-one knew the species that was producing this kwa! kwa! kwa!” said Lucia Di Iorio, a researcher in ecoacousti
http://dlvr.it/SKKGcD