Coral reefs are the most diverse communities in the world, but what happens when fishermen catch the fish before they reach a state of maturity? Every year, over 30,000 tons of reef fish come into Hong Kong to be sold at the fish markets. The majority of these fish are considered juveniles, meaning they did not yet get the chance to reproduce. Introduce your biologists to this problem and hear some of the effects that might come to the reef fish and their delicate community.