Identification:
A truly eye-catching polyclad, Pseudobiceros fulgor is known for its iridescent orange to copper base color adorned with brilliant white lines scattered across the body. The margins are often lined with a thin dark rim, and the body ripples with graceful movement. Its appearance is reminiscent of glinting fireflies or shimmering metal—earning it the species name “fulgor,” Latin for “flash” or “brightness.”

Size:
Can reach up to 5 cm in length.

Habitat:
Prefers coral rubble zones, reef flats, and the base of coral bommies, where it glides during the day in full display.

Depth Range:
3 – 25 meters

Diet:
Carnivorous, feeding on sessile invertebrates, including small tunicates or colonial ascidians. Uses a muscular eversible pharynx to digest prey externally.

Reproduction:
Simultaneous hermaphrodite, engaging in the remarkable mating behavior of penis fencing. After the duel, only one partner typically inseminates the other, who later lays the eggs.

Fun Fact:
The electric blue markings are thought to act as aposematic signals, warning predators of an unpalatable or toxic meal. This visual flamboyance may also play a role in mate recognition among similarly colored species.