This NOAA image shows a bicolor angelfish (Centropyge bicolor) swimming in front of a tomato clownfish (Amphiprion frenatus). The clownfish has taken refuge in the stinging tentacles of a sea anemone. The bicolor angelfish are common throughout the reefs of the South Pacific. It grows to a maximum size at just under 6 inches (15 centimeters). The tomato clownfish is one of a number of fish species that form special symbiotic relationships with sea anemones. Because of this many of them are referred to as anemonefish.