Trivia: What makes the water in Australia’s Hutt Lagoon appear bright pink?
Algae
Sand
Pollutants
Salt deposits
The correct answer is Algae
So why is this answer correct? : Hutt Lagoon is a marine salt lake located near the Indian Ocean on the coast of Western Australia, about five hours north of Perth. Its pink Pepto-Bismol-like coloring comes from a naturally occurring, carotenoid-producing algae that is a great source of Vitamin A. Hutt Lagoon is a pinkish color year-round, but its color is most vibrant on sunny days.