The largest animal ever to have lived, the majestic blue whale (Balaenoptera musculus). 🐳 https://t.co/pkfTX18kWL https://video.twimg.com/ext_tw_video/1773753236266049536/pu/vid/avc1/720x720/Y1PUsCRRtE0xi0Jv.mp4?tag=12