Come identificare Starry Triggerfish

Per identificare Starry Triggerfish (Abalistes stellaris), osserva queste caratteristiche chiave.

Caratteristiche fisiche

Forma del corpo

compressed

Colorazione

The body is typically greenish-grey to brownish-grey dorsally, fading to lighter shades ventrally. It is covered with numerous small, pale blue to white spots, particularly on the posterior half of the body and fins. Three broad, dark, oblique bands may be present on the head and anterior body, though these can be indistinct. The caudal fin is often yellowish with a dark margin, and the lobes can be elongated in adults.

Tipo di squame

ganoid

Posizione della bocca

terminal

Caratteristiche distintive

First dorsal spine can be locked erect for defense, Small, pale spots covering the body, Often elongated caudal fin lobes in adults, Powerful jaws with strong teeth

Pinna dorsale

Two dorsal fins; the first with 3 spines (the first being large and lockable, the second much smaller), and the second dorsal fin with 25-27 soft rays. The second dorsal fin is typically tall and rounded.

Pinna caudale

Caudal fin is emarginate to lunate, often with elongated upper and lower lobes in larger individuals. It has 12 principal rays.

Pinna pettorale

Pectoral fins are relatively small, with 13-15 rays.

Pinne distintive

Anal fin is similar in shape and size to the second dorsal fin, with 24-26 soft rays. Pelvic fins are fused into a single, spiny flap.

Consigli per l'identificazione

1. 1

   Coloration and Spotting

   Look for the characteristic small, pale spots scattered over the body, especially on the posterior half. The overall body color is usually greenish-grey to brownish-grey.

2. 2

   Caudal Fin Shape

   Observe the caudal fin; in adults, the upper and lower lobes are often elongated, giving it a lunate or deeply emarginate appearance.

3. 3

   Dorsal Spine

   Note the prominent, lockable first dorsal spine, a hallmark of triggerfish. The second dorsal fin is tall and rounded.

4. 4

   Size

   Abalistes stellaris can grow quite large, up to 60 cm (24 inches) in total length, which helps distinguish it from smaller triggerfish species.

Esplora Starry Triggerfish