Junior cleanup crew
Juvenile queen angelfish feed on parasites living on larger fishes. It might sound daring, but it's a common symbiotic relationship on coral reefs: The small fish position themselves to advertise their cleaning services and other fishes line up. Cleaning stations are safe zones from predation. While the young fish get an easy, high-protein meal, their "clients" benefit from the removal of parasites on their scales and gills. Adult queen angelfish are omnivores, feeding mainly on sponges and algae.