Scientific Name: Phyllidiopsis cardinalis
Common Name: Cardinal phyllidiopsis

Adult Size: 20 – 50 mm
Depth Range: 5 – 30 m
Biotope / Habitat: Coral reef slopes and rocky outcrops, usually seen on sponges and encrusting reef structures
Diet: Sponge feeder, using its radula to scrape and consume sponge tissue for nourishment and chemical defense
Reproduction: Hermaphroditic; reciprocal mating occurs, with delicate, coiled egg ribbons laid in sheltered reef areas
Fun Fact: Phyllidiopsis cardinalis is recognized by its vivid pinkish to red body with bold black lines and distinctive raised tubercles — a real showstopper of the reef!

This striking nudibranch’s contrasting colors make it a favorite subject for underwater photographers and a delight for divers exploring the rich tapestry of reef life.