Come identificare Scribbled Filefish

Per identificare Scribbled Filefish (Aluterus scriptus), osserva queste caratteristiche chiave.

Caratteristiche fisiche

Forma del corpo

elongated

Colorazione

Highly variable, typically olive-brown to greenish-gray, covered with intricate, irregular blue, green, or black lines and spots that resemble scribbles. Can rapidly change color to camouflage. Often has a few prominent black spots on the body.

Tipo di squame

none

Posizione della bocca

terminal

Caratteristiche distintive

Elongated, compressed body, Small, upturned mouth with strong teeth, First dorsal spine is long and slender, locking into place, Second dorsal spine is rudimentary or absent, Small, fan-like pectoral fins, Large, rounded caudal fin, Rough, sandpaper-like skin due to small, embedded scales

Pinna dorsale

Two dorsal fins; the first consists of a single, long, erectile spine that can be locked upright, followed by a rudimentary second spine. The second dorsal fin is soft-rayed, long, and low, extending along much of the posterior dorsal surface (typically 43-49 rays).

Pinna caudale

Large, rounded, and fan-like, often with a slightly concave posterior margin.

Pinna pettorale

Small and fan-shaped, positioned high on the body (typically 13-15 rays).

Pinne distintive

Pelvic fin is absent, replaced by a dewlap-like structure or a small, rough spine.

Consigli per l'identificazione

1. 1

   Body Shape and Size

   Look for an elongated, laterally compressed body, reaching up to 110 cm (43 inches) in total length, making it one of the largest filefish species.

2. 2

   Coloration and Pattern

   Observe the distinctive 'scribbled' pattern of irregular blue, green, or black lines and spots over a brownish-green to olive-gray background. This pattern is unique to the species.

3. 3

   Dorsal Spine

   Note the prominent, long, and slender first dorsal spine that can be locked upright. This is a key characteristic of filefishes.

4. 4

   Mouth

   Identify the small, upturned mouth with strong, incisor-like teeth, adapted for grazing.

5. 5

   Caudal Fin

   The large, rounded caudal fin is also a good identifier, often with a slightly concave posterior margin.

Esplora Scribbled Filefish