Come identificare Round Scad

Per identificare Round Scad (Decapterus punctatus), osserva queste caratteristiche chiave.

Caratteristiche fisiche

Forma del corpo

torpedo

Colorazione

Dorsal side is typically iridescent blue-green to olive-green, fading to silvery-white on the flanks and belly. A small, distinct black spot is often present on the upper operculum near the pectoral fin origin. The caudal fin is often dusky or yellowish.

Tipo di squame

cycloid

Posizione della bocca

terminal

Caratteristiche distintive

Elongated, fusiform body, slightly compressed laterally., A series of 9-10 finlets posterior to the dorsal and anal fins., Lateral line with a distinct arch over the pectoral fin, becoming straight posteriorly., Posterior part of the lateral line armed with a series of scutes (bony plates), though less prominent than in some other carangids., Adipose eyelid well developed, covering most of the eye., Small, terminal mouth with minute teeth.

Pinna dorsale

Two dorsal fins; the first with 8 spines, the second with 1 spine and 29-33 soft rays, followed by 9-10 finlets.

Pinna caudale

Deeply forked caudal fin, characteristic of fast-swimming pelagic fish.

Pinna pettorale

Relatively short, falcate pectoral fins.

Pinne distintive

Anal fin with 2 detached spines followed by 1 spine and 25-29 soft rays, also followed by 9-10 finlets. Pelvic fins are small.

Consigli per l'identificazione

1. 1

   Body Shape and Finlets

   Look for the elongated, torpedo-shaped body and the distinctive series of 9-10 small finlets behind both the dorsal and anal fins. This is a key characteristic of the genus Decapterus.

2. 2

   Lateral Line

   Observe the lateral line. It will have a pronounced arch over the pectoral fin and then straighten towards the caudal peduncle, where it is armed with a series of small, but noticeable, scutes.

3. 3

   Opercular Spot

   Check for a small, dark (often black) spot on the upper part of the operculum (gill cover) near the origin of the pectoral fin. This spot is usually present and can aid in identification.

4. 4

   Adipose Eyelid

   Note the well-developed adipose eyelid that covers a significant portion of the eye, leaving only a central slit for vision.

Esplora Round Scad