Fiji Blue Devil Identification Guide
Recognize this reef damselfish by its two-tone split of electric blue up front and golden yellow toward the tail.
Read the full Fiji Blue Devil encyclopedia entry →
Key identification features
- Front two-thirds of the body electric blue, transitioning to yellow-orange across the rear body and tail
- Sharp but gradual color transition rather than a hard vertical bar
- Small dark spot near the base of the pectoral fin
- Compact, deep-bodied shape typical of Chrysiptera damselfish
- Small size, usually 2-3 inches (5-7 cm)
Common look-alikes
- Blue devil damselfish is blue over its entire body with no yellow rear half, unlike the two-tone split seen here.
- Yellowtail blue damselfish has a hard, clean line between blue body and yellow tail, rather than a graded blue-to-yellow transition running further up the body.
- Fiji blue devil's yellow extends further forward onto the body itself, not just the tail fin, which is the clearest separating feature from both look-alikes.
Where you'll see one
The Fiji blue devil is found on shallow reef flats and lagoons in the South Pacific, most commonly around Fiji, Tonga, and neighboring island groups. It shelters among branching coral and rubble in surge-prone shallow water, often in small loose groups that dart for cover when disturbed.
Frequently asked questions
How is the Fiji blue devil different from the plain blue devil damselfish?
The Fiji blue devil has yellow coloring extending across its rear body and tail, while the blue devil damselfish is blue over its entire body.
Is the blue-to-yellow transition sharp or gradual on this fish?
It is a graded transition across the mid-body rather than one hard vertical line, which distinguishes it from species with a crisp blue-yellow tail break.