11-Jun-2026 Theme: 'Reef'

(1) What do corals expel inside their tissues to cause coral bleaching?

Answer: Zooxanthellae (symbiotic algae).

(2) World Reef Day is observed annually on what date?

Answer: 1 June.

(3) Which fish species is famous for helping maintain reef health by grazing algae that might otherwise outcompete corals?

Answer: Parrotfish.

(4) Which 2003 animated film helped make clownfish one of the world's most recognizable reef species?

Answer: Finding Nemo.

(5) Which coral reef system is the largest in the world?

Answer: Great Barrier Reef.

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