Come identificare Blue-barred Parrotfish

Per identificare Blue-barred Parrotfish (Scarus ghobban), osserva queste caratteristiche chiave.

Caratteristiche fisiche

Forma del corpo

elongated

Colorazione

Highly variable depending on sex and life stage. Initial Phase (IP) individuals (females and some males): Generally duller, often yellowish-brown to reddish-brown, with several indistinct pale bars or blotches on the body. Fins may be reddish or yellowish. Terminal Phase (TP) individuals (dominant males): Striking blue-green to green body coloration, often with prominent blue or purple bars or markings on the head and body. The snout and chin can be yellowish or orange. Caudal fin typically has blue margins and a lunate shape. The fused teeth are often blue-green.

Tipo di squame

cycloid

Posizione della bocca

terminal

Caratteristiche distintive

Fused teeth forming a prominent beak-like structure, characteristic of parrotfish., Large, robust body size, reaching up to 90 cm in total length., Significant sexual dichromatism and ontogenetic color changes., Terminal phase males exhibit distinct blue-green coloration with blue bars on the head., Initial phase individuals are generally duller, often yellowish or brownish with faint bars.

Pinna dorsale

9 spines, 10 soft rays; continuous, relatively low.

Pinna caudale

Lunate in terminal phase males, slightly emarginate to truncate in initial phase individuals. Often with blue margins in TP males.

Pinna pettorale

15-16 rays; relatively large and fan-like.

Pinne distintive

Pelvic fins are thoracic, with 1 spine and 5 soft rays. Anal fin has 3 spines and 9 soft rays.

Consigli per l'identificazione

1. 1

   Size and Body Shape

   Look for a large, robust parrotfish, often exceeding 50 cm. The body is elongated and somewhat compressed.

2. 2

   Coloration (Terminal Phase Male)

   Distinctive blue-green body with prominent blue bars on the head and sometimes on the body. The snout and chin may be yellowish. The fused teeth are often blue-green.

3. 3

   Coloration (Initial Phase/Juvenile)

   Duller, often yellowish-brown to reddish-brown, with several indistinct pale bars or blotches. Fins may be reddish or yellowish. This phase can be confused with other parrotfish species.

4. 4

   Beak-like Mouth

   All parrotfish have fused teeth forming a beak. Observe the color of the beak, which can be blue-green in TP males.

5. 5

   Caudal Fin Shape

   In terminal phase males, the caudal fin is distinctly lunate (crescent-shaped) with elongated lobes. In initial phase individuals, it is more truncate to slightly emarginate.

Esplora Blue-barred Parrotfish