Reefs of La PargueraIn Puerto Rico, corals, seagrass, and mangroves paint a colorful Caribbean scene by day, while the waters of a rare bioluminescent bay glow blue at night. View the full storyCredits: NASA Earth Observatory / Michala Garrison Download Share Tags Earth Observatory Image of the DayTakenMay 15, 2024Image CreditNASA Earth Observatory / Michala GarrisonSize720x480px