TED-Ed: The big-beaked, rock-munching fish that protect coral reefs | Mike Gil

Parrotfish play a crucial role in maintaining coral reef ecosystems by consuming seaweed that competes with coral larvae for space. Their unique beak-like teeth allow them to scrape seaweed from rocks, promoting coral growth. However, human activities like overfishing and pollution have disrupted these ecosystems, leading to unchecked seaweed growth and weakened coral defenses. Understanding parrotfish behavior and their ecological importance can help develop strategies to preserve coral reefs, which are vital for marine biodiversity and human benefits.

What unique feature allows parrotfish to consume rocks?

• Their long tongues

• Their strong jaws

• Their beak-like teeth

• Their sharp fins

Why is seaweed considered a threat to coral reefs?

• It competes for space with coral larvae

• It attracts predators

• It blocks sunlight

• It increases water temperature

How do parrotfish contribute to the coral reef ecosystem?

• By increasing water temperature

• By providing shelter for other fish

• By eating seaweed and clearing space for coral

• By building coral structures

What is one consequence of overfishing on coral reefs?

• More predators in the area

• Reduced number of parrotfish

• Decreased seaweed growth

• Increased coral growth

Why are coral reefs important to human life?

• They produce oxygen

• They offer opportunities for ecotourism and sustainable fishing

• They provide fresh water

• They are a source of fossil fuels