How to Identify Spotty-bellied wrasse

To identify Spotty-bellied wrasse (Halichoeres tenuispinis), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Males typically display a greenish-blue body with irregular reddish-orange spots and lines, particularly on the head and anterior body. A prominent black spot is often present on the dorsal fin. The belly can be whitish with small, scattered dark spots, giving it its common name. Females and juveniles are generally duller, often yellowish-brown to reddish-brown with less distinct markings, sometimes with a series of dark spots along the lateral line and a dark spot on the caudal peduncle. Coloration can vary geographically and with mood.

Scale type

cycloid

Mouth position

terminal

Distinctive features

Elongated body typical of Halichoeres wrasses, Distinctive spot patterns on the belly (more pronounced in some individuals/sexes), Sexual dimorphism in coloration and patterning, Small, pointed snout

Dorsal fin

Single, long dorsal fin with 9 spines and 11-12 soft rays. Often features a prominent black spot in males.

Tail fin

Rounded to slightly truncate caudal fin.

Pectoral fin

Well-developed pectoral fins, typically clear or slightly yellowish.

Distinctive fins

Pelvic fins are relatively small.

Identification Tips

1. 1

   Body Shape

   Look for the characteristic elongated, torpedo-shaped body of a wrasse.

2. 2

   Coloration (Males)

   Observe for greenish-blue body with reddish-orange spots and lines, especially on the head, and a black spot on the dorsal fin. The 'spotty belly' may be visible.

3. 3

   Coloration (Females/Juveniles)

   Note the duller yellowish-brown to reddish-brown coloration, often with less distinct markings, and sometimes a series of dark spots along the lateral line.

4. 4

   Behavior

   Watch for its characteristic wrasse swimming pattern and its habit of burrowing into the sand at night or when threatened.

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