One hydrophone sitting 891 meters down in Monterey Canyon, wired to shore by 52 kilometers of cable, recorded 2,111 days out of 2,192 between July 2015 and June 2021, and humpback song climbed from 34 percent of days to 76 while blue whale song fell away after a marine heat wave.
A single hydrophone bolted to the seafloor of Monterey Bay has produced six years of near-continuous acoustic data…
