How to Identify Hardwicke's Wrasse

To identify Hardwicke's Wrasse (Thalassoma hardwicke), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

The body is typically greenish-blue to yellowish-green dorsally, fading to a lighter ventral side. The most distinctive feature is the presence of six prominent, dark, vertical bars or blotches along the flanks, which are more pronounced in males and juveniles. The head often has intricate blue and orange markings. The caudal fin is typically yellow with blue margins, and the pectoral fins are clear to yellowish.

Scale type

cycloid

Mouth position

terminal

Distinctive features

Six prominent dark vertical bars on the flanks, Elongated body shape, Pointed snout, Terminal mouth with small, conical teeth

Dorsal fin

Dorsal fin with 8 spines and 13 soft rays, continuous and relatively low.

Tail fin

Caudal fin truncate to slightly emarginate, often with elongated outer rays in larger males.

Pectoral fin

Pectoral fins are relatively large and rounded, used for propulsion.

Distinctive fins

Pelvic fins are small and located ventrally, just behind the pectoral fins. Anal fin with 3 spines and 11 soft rays.

Identification Tips

1. 1

   Body Pattern

   Look for the six distinct dark vertical bars on the sides of the body. This is the most reliable identifying feature.

2. 2

   Coloration

   Observe the greenish-blue to yellowish-green body color, often with intricate blue and orange markings on the head.

3. 3

   Fin Shape

   Note the truncate to slightly emarginate caudal fin, which can have elongated outer rays in larger individuals.

4. 4

   Behavior

   Its active, darting swimming style and tendency to forage among corals and rocks are characteristic.

Explore Hardwicke's Wrasse