ExploreFish

Christmas Wrasse

thalassoma trilobatum

The Christmas Wrasse is a vibrant and highly active reef fish known for its stunning, festive coloration. Swimming with a distinctive rowing motion using only its pectoral fins, this energetic wrasse is a staple of Indo-Pacific shallow reefs. They are protogynous hermaphrodites, meaning they can change sex from female to male depending on social dynamics. This species plays a crucial role in maintaining reef health by feeding on a variety of small, hard-shelled invertebrates, making them fascinating to watch for snorkelers and divers alike. To easily track and identify Christmas Wrasse on your next adventure, download the Snappit app.

Habitat: Found in shallow, surge-swept coral reefs, rocky shores, and reef flats exposed to wave action.

Appearance

Terminal-phase males display a breathtaking array of colors, with reddish-orange bodies marked by two rows of green rectangular spots, a green-blue head with pink or orange facial stripes, and a bright yellow tail fin. Females and juveniles are more modestly colored, usually brownish-green with checkered patterns. They have a sleek, elongated, cigar-shaped body that typically reaches lengths between 15 to 30 centimeters.

KingdomAnimaliaPhylumChordataClassActinopterygiiOrderLabriformesFamilyLabridaeGenusThalassoma

Christmas Wrasse

Interesting facts

A single dominant male maintains a harem of females; if he dies, the largest female will transition to male within a few weeks.

Like many wrasses, this species burrows into the sand at night or when threatened to hide from predators.

The Christmas Wrasse gets its name from its festive red and green coloration, which resembles traditional holiday colors.

Special abilities

Females can transition into colorful dominant males when the social structure requires it, ensuring reproductive continuity.

Uses its pectoral fins in a unique rowing motion to maneuver swiftly through turbulent, wave-swept reef zones.

Can dive quickly into sandy patches to bury itself to escape predators or sleep safely at night.

Measurements & details

Length: 15-30 cm
Weight: 0.1-0.5 kg
Lifespan: 5-10 years
Top Speed: 15 km/h
Clutch Size: 1000-5000
Incubation: 1-2 days

Diet & Feeding

Feeds primarily on small, hard-shelled benthic invertebrates such as crabs, mollusks, and sea urchins by crushing them with specialized pharyngeal teeth.

Age differences: Juveniles feed on smaller crustaceans and occasionally clean ectoparasites off larger fish, whereas adults target larger, hard-shelled invertebrates.

Primary Foods

Crabs
Sea Urchins
Mollusks
Brittle Stars
Small Shrimps

Foraging Method

Foraging

Ecological connections

eaten by

Giant Moray

Gymnothorax javanicus

Eaten by larger reef predators when seeking shelter in reef crevices at night.

hunts

Burrowing Urchin

Echinometra mathaei

The Christmas Wrasse hunts and feeds on these small sea urchins, helping control their populations.

hunts

Left-handed Hermit Crab

Calcinus laevimanus

The wrasse uses its strong jaws to crack open the shells of these crabs.

Traits

No trait badges are assigned for this object yet.

Also known as

No aliases listed yet.

Collections

Collections for this object will appear here as more themes are added.

Safety

Danger

1/5 · Very low

No special safety notes yet.

Frequently Asked Questions

How to identify Christmas Wrasse?

The easiest way to identify Christmas Wrasse is to use the Snappit nature identifier app.

How long is Christmas Wrasse?

15-30 cm

How much does Christmas Wrasse weigh?

0.1-0.5 kg

How long does Christmas Wrasse live?

5-10 years

How fast can Christmas Wrasse move?

15 km/h

What does Christmas Wrasse eat?

Feeds primarily on small, hard-shelled benthic invertebrates such as crabs, mollusks, and sea urchins by crushing them with specialized pharyngeal teeth.

Where is Christmas Wrasse usually found?

Found in shallow, surge-swept coral reefs, rocky shores, and reef flats exposed to wave action.

How does Christmas Wrasse hunt?

Foraging