This 19 March 2019 video says about itself:
The Complex world of Hammerhead Mating Rituals | BBC Earth
The Galapagos Islands are like no other place on Earth. 600 miles off the mainland of South America, this isolated archipelago lies in the heart of the Pacific Ocean. This investigation employs tagging technology, underwater mapping, cinematography, thermal cameras and other techniques to track the most mysterious creatures, solve unanswered riddles, explore ancient islands reclaimed by the sea, and encounter the islands’ volcanic underbelly.