Mystery Monday revealed! The answer is:
Sperm Whale
Paul Jones shared this sighting report from our last 2020 tour. Check out the recorded underwater vocalizations in the video below!
“On March 18 aboard Searcher we found a group of about 20 sperm whales just east Isla Espiritu Santo in the Gulf of California. We had 20 animals that surfaced very near Searcher in 5-7 smaller groups. One whale swam straight toward Searcher affording a great view of its asymmetric blowhole before it fluked up and dove. Others bobbed at the surface for long periods as they recharged their muscles with oxygen, providing excellent opportunities for passengers to take photos of these impressive, deep-diving whales.”
https://youtu.be/2nReXeB39Zc