The largest sea turtle in the world, the extremely rare Pacific leatherback, has been spotted this week offshore of Monterey, Moss Landing, and Half Moon Bay along with a massive bloom of jellyfish, which are their main prey. The sightings continue to be reported and it appears the leatherbacks are moving north towards San Francisco Bay. Because individuals can be identified by unique coloration patterns on the top of their head, experts at the SeaTurtles.org can confirm from photos that this female was seen twice this week by by crew and passengers onboard the Blue Ocean Whale Watch’s vessel that operates out of Monterey.

 Photo: SeaTurtles.org / SF

(via @SeaTurtles_org )