How to Identify Hookfin mullet

To identify Hookfin mullet (Mugil falcipinnis), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Dorsal surface typically dark olive-green to bluish-grey, fading to silvery sides and a white belly. Fins are generally dusky, with the pectoral fins often having a darker base.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Deep body, compressed laterally., Small, terminal mouth with fine teeth., Adipose eyelid well-developed, covering most of the eye., Large, falcate (sickle-shaped) pectoral fins, which are a primary distinguishing feature.

Dorsal fin

Two separate dorsal fins. The first dorsal fin has 4 strong spines. The second dorsal fin has 1 spine and 8-9 soft rays.

Tail fin

Moderately forked caudal fin.

Pectoral fin

Long and distinctly falcate, reaching beyond the origin of the first dorsal fin. Typically 16-17 rays.

Distinctive fins

The highly curved, sickle-shaped pectoral fins are the most distinctive fin feature, giving the species its common name.

Identification Tips

1. 1

   Pectoral Fins

   The most reliable identification feature is the long, distinctly falcate (sickle-shaped) pectoral fins. These fins are noticeably curved and extend well past the origin of the first dorsal fin.

2. 2

   Body Depth

   Compared to many other mullet species, Mugil falcipinnis has a relatively deeper body, which can be observed when viewed from the side.

3. 3

   Adipose Eyelid

   Observe the adipose eyelid, which is well-developed and covers a significant portion of the eye, leaving only a central slit for vision.

4. 4

   Coloration

   Look for the characteristic dark olive-green to bluish-grey dorsal coloration, silvery sides, and white belly.

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