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Redlip Parrotfish

scarus rubroviolaceus

The Redlip Parrotfish is a vibrant, active resident of Indo-Pacific coral reefs, instantly recognizable by its sturdy beak and bright coloration. Belonging to the family Labridae, these fish are crucial ecological architects. They spend their days grazing on turf algae, using their fused teeth to scrape rock surfaces clean. This behavior not only controls algae growth, which otherwise smothers coral reefs, but also helps break down reef substrate into fine white sand. Watching a Redlip Parrotfish in the wild is a delight, as they glide gracefully through shallow waters, often making audible crunching sounds as they feed. Their complex life cycle, featuring dramatic color changes and sex transitions, makes them a fascinating study in evolutionary biology. Use the Snappit app to scan, identify, and learn about Redlip Parrotfish in real-time.

Habitat: Found in shallow, sunlit coral reefs, lagoons, and rocky seaward reef slopes.

Appearance

Adult males in the terminal phase display a striking bi-colored pattern: a dark blue-grey or dark green front half contrasted with a lighter green-blue rear body, accented by a bright pinkish-red upper lip. Females and initial-phase males are more subdued, exhibiting a reddish-brown coloration with fine dark scales. They possess a robust, oblong body shape and a powerful, bird-like beak formed by fused teeth.

KingdomAnimaliaPhylumChordataClassActinopterygiiOrderLabriformesFamilyLabridaeGenusScarus

Redlip Parrotfish

Interesting facts

During their sex and color transition, their behavior also shifts from submissive herding to highly territorial defense of a harem.

Their beak is actually made of fused teeth, which are harder than copper, brass, and even some types of steel.

They are major producers of sand; a single large parrotfish can excrete hundreds of pounds of fine white sand each year.

Special abilities

At night, this species can secrete a thick, transparent bubble of mucus around itself to mask its scent from predators like moray eels.

Equipped with specialized throat teeth that grind ingested rock and coral into sand, allowing them to digest tiny algae trapped inside.

They are protogynous hermaphrodites, meaning individuals can change their sex from female to male when dominant males are absent.

Measurements & details

Length: 30+ cm
Weight: 1+ kg
Lifespan: 10+ years
Top Speed: 15 km/h

Diet & Feeding

Mainly grazes on turf algae growing on rocky surfaces and coral skeletons, swallowing rock fragments in the process.

Age differences: Juveniles consume a higher ratio of small invertebrates before transitioning to an almost entirely herbivorous scraping diet as adults.