How to Identify Spottail Pinfish

To identify Spottail Pinfish (Diplodus holbrookii), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Silvery body, often with faint vertical bars that may fade or intensify depending on mood or habitat. The most distinctive feature is a prominent, dark, oval-shaped spot at the base of the caudal fin, extending onto the caudal peduncle. Fins are typically translucent to dusky.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Prominent black spot at the base of the caudal fin, Silvery body coloration, Deep, compressed body

Dorsal fin

Single dorsal fin with 12 spines and 12-14 soft rays. The spiny portion is longer than the soft-rayed portion.

Tail fin

Moderately forked caudal fin.

Pectoral fin

Long and pointed pectoral fins.

Distinctive fins

Pelvic fins are thoracic, located directly below the pectoral fins.

Identification Tips

1. 1

   Caudal Spot

   The most reliable identification feature is the distinct, dark, oval-shaped spot located precisely at the base of the caudal fin, extending onto the caudal peduncle. This spot is usually very clear and well-defined.

2. 2

   Body Shape and Color

   A deep, compressed, silvery body with a relatively small mouth. Faint vertical bars may be present, especially in juveniles or stressed individuals, but these are not as prominent as in some other sparids.

3. 3

   Fin Count

   Counting dorsal fin spines (12) and soft rays (12-14) can help differentiate from very similar species, though the caudal spot is usually sufficient.

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