Summary:
- Cleaner fish are small fish that live on coral reefs and help remove parasites and dead skin from other larger fish, acting as "janitors" of the reef ecosystem.
- However, recent studies have shown that cleaner fish can also spread diseases and parasites to the fish they clean, potentially harming the overall health of the coral reef.
- Researchers are studying the complex role of cleaner fish in coral reef ecosystems, balancing their beneficial cleaning services with the potential risks they pose as disease vectors.