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Zooxanthellae, are microscopic, single-celled algae that live and grow within the tissue of hard coral polyps. Several million zooxanthellae live in just one square inch of coral. Coral polyps and their skeletons are actually clear or white and it is pigment in the zooxanthellae that gives coral more than 90% of its colorful hues.

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What are the signs that coral is dying?

Signs that coral is dying include bleaching (loss of color), tissue necrosis (white or black patches), reduced growth, and increased susceptibility to disease. These signs indicate that the coral is stressed and may not survive unless conditions improve.


What are the main threats to coral reefs posed by coral-eating fish, and how can their impact be mitigated?

Coral-eating fish can threaten coral reefs by overgrazing on the coral, which can lead to coral death and reduced reef health. Their impact can be mitigated by managing fishing practices, protecting key herbivorous fish species, and promoting coral reef conservation efforts.


Is coral flora or fauna?

Coral is considered fauna because it is made up of living animals known as coral polyps. Coral polyps secrete calcium carbonate to build coral reefs, which provide habitats for a diverse range of marine life.


What happens when coral polyps die?

When coral polyps die, their hard outer skeletons remain intact and empty, resulting in the formation of coral reefs. The decomposition of the soft tissues of the coral polyps provides nutrients for new coral growth, contributing to the continuous development of coral reefs.


How do parrotfish contribute to the ecosystem by eating coral and helping to maintain the health of coral reefs?

Parrotfish play a crucial role in the ecosystem by eating algae that can smother coral reefs. By grazing on algae, parrotfish help to keep the coral healthy and allow new coral to grow. This helps to maintain the balance of the coral reef ecosystem and supports the overall health of the reef.