Frontiers in Marine Science Bryde’s whales produce Biotwang calls, which occur seasonally in long-term acoustic recordings from the central and western North Pacific マリアナ海溝から聞こえる謎の音の正体が解明される Youtubeでもエピソード公開中 https://www.youtube.com/channel/UCDZIILaxaWp54ljz4kYqAhA