How to Identify Blackspot Tuskfish

To identify Blackspot Tuskfish (Choerodon schoenleinii), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Highly variable. Juveniles are often greenish-brown with lighter spots and a prominent black spot on the dorsal fin. Adults can range from bluish-grey to greenish-brown, often with lighter ventral surfaces. Some individuals may display purplish or reddish hues. A distinctive dark spot is typically present on the posterior part of the spinous dorsal fin, though its prominence can vary. Males may exhibit more intense coloration, especially during breeding.

Scale type

cycloid

Mouth position

terminal

Distinctive features

Prominent, tusk-like canine teeth at the front of both jaws, used for crushing shells., A distinct black spot on the posterior part of the spinous dorsal fin (though sometimes faded in very large adults)., Thick, fleshy lips., Large, robust body., Often displays a 'hump' on the forehead in larger adults.

Dorsal fin

Single, long dorsal fin with 12 spines and 10 soft rays. The black spot is located on the posterior part of the spinous portion.

Tail fin

Truncate to slightly rounded caudal fin.

Pectoral fin

Large, rounded pectoral fins.

Distinctive fins

Pelvic fins are relatively small.

Identification Tips

1. 1

   Dorsal Fin Spot

   Look for the characteristic black spot on the posterior part of the spinous dorsal fin. While it can fade in very large individuals, it's a key identifier for most sizes.

2. 2

   Tusk-like Teeth

   The prominent, protruding canine teeth at the front of the mouth are a definitive feature of the Choerodon genus, distinguishing it from many other wrasses.

3. 3

   Body Shape and Size

   Its large, robust, and compressed body, often with a slightly humped forehead in adults, helps differentiate it from smaller or more slender wrasse species.

4. 4

   Coloration

   While variable, the overall bluish-grey to greenish-brown coloration, often with lighter undersides, is typical. Juveniles are often more mottled.

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