Ladder Wrasse

Thalassoma Trilobatum
Ladder Wrasse - Marinewise © 2024 MarineWise

Quick Facts

Scientific name Thalassoma Trilobatum
Other names Christmas Wrasse, Greenbarred Wrasse, Greenblocked Wrasse
Size Up to 30 cm (11.8 in)
Weight Up to 1.5 kg (3.3 lb)


Habitat & AU Distribution Coastal waters amongst coral reefs with seagrass & algae areas
Depth Range 2 - 20 m (65 ft)
Ladder Wrasse Distribution

Interesting Info

  • The Ladder Wrasse is a species of marine fish primarily found in the coastal waters of Queensland, Australia.
  • It has a distinct appearance with a orange-reddish body with bluish-green ladder-like markings along its sides.
  • This fish is commonly seen swimming near coral reefs and rock formations.
  • The Ladder Wrasse is a carnivorous fish, feeding on small crustaceans, molluscs, and other invertebrates.
  • The Ladder Wrasse is a protogynous hermaphrodite, meaning that it starts life as a female and can later change into a male. These fish are known to form harem groups, with one dominant male and several females.
  • They are known to spawn during the summer months, with females releasing thousands of eggs that are fertilised by the male. The eggs hatch into larvae after several days and then drift in the ocean currents for several weeks before settling onto the reef and beginning their life as juveniles.
  • Estimated lifespan is between 10-15 years in the wild.
Species Interaction

Aquarium, Snorkeling & Diving

The Ladder Wrasse is a popular species among aquarium hobbyists due to its vibrant colours and active behaviour. It is often kept in home aquariums and is readily available in the aquarium trade. It is also a often sought-after fish for divers and snorkelers because of its amazing colouring.

Scientific Classification

Kingdom: Animalia

Phylum: Chordata

Class: Actinopterygii

Order: Perciformes

Family: Labridae

Genus: Thalassoma

Species: Thalassoma Trilobatum

Conservation Status

The conservation status of the ladder wrasse, has not been evaluated by the International Union for Conservation of Nature (IUCN). This means that there is currently no official designation for the species on the IUCN Red List of Threatened Species.

How to catch
Ladder Wrasse

Catch Difficulty: Easy

Tackle: Running Sinker Rig

Bait: Fresh cut flesh baits, Pilchards, Prawns, Squid, Worms

Technique: Keep bait on the bottom, Keep bait close to the reef/structure

Popularity: Not targeted

Ladder Wrasse
As Aquarium Fish

Care Level: Easy to moderate

Temperament: Peaceful

Diet: Carnivore

Reef Compatible: Yes

Minimum Tank Size: 70 gallons

Recreational Viewing
- Snorkeling & Scuba

Finding: Easy

Temperament: Peaceful

Location: Inner Reef, Outer Reef, Lagoon

Danger: None

error: Alert: Content selection is disabled!!