Kako prepoznati Grey Triggerfish

Za prepoznavanje vrste Grey Triggerfish (Balistes capriscus), pogledajte ova ključna obilježja.

Fizičke karakteristike

Oblik tijela

compressed

Obojenost

Generally grey to olive-brown, often with irregular blotches or spots that can change intensity to match the substrate. Some individuals may exhibit faint blue or green tinges. The belly is typically lighter.

Vrsta ljusaka

ganoid

Položaj usta

terminal

Posebna obilježja

Small, terminal mouth with strong, incisor-like teeth adapted for crushing shells., Rough, leathery skin with small, embedded scales., Prominent, independently moving eyes set high on the head., A deep groove anterior to the eye and below the nostril., The first dorsal spine is large and can be locked upright by the second spine, forming the 'trigger' mechanism.

Leđna peraja

Two dorsal fins. The first dorsal fin has 3 spines, with the first spine being very stout and capable of being locked erect. The second dorsal fin is soft-rayed, with 26-29 rays, and is similar in shape and size to the anal fin.

Repna peraja

Slightly rounded to truncate caudal fin, often with elongated upper and lower rays in adults.

Prsna peraja

Small, rounded pectoral fins, typically with 13-15 rays.

Posebne peraje

Pelvic fins are fused into a single, spiny projection located on the belly, which can be retracted into a sheath.

Savjeti za identifikaciju

1. 1

   Body Shape and Coloration

   Look for a compressed, oval-shaped body, typically grey to olive-brown, often with mottled patterns. The skin is noticeably rough.

2. 2

   Dorsal Fin

   The most distinguishing feature is the prominent first dorsal spine, which can be locked upright. This 'trigger' mechanism is unique to triggerfishes.

3. 3

   Mouth and Teeth

   Observe the small, upturned mouth with strong, chisel-like teeth, indicative of its diet of hard-shelled invertebrates.

4. 4

   Pelvic Fin

   Note the single, spiny pelvic projection on the belly, which is a characteristic of the family Balistidae.

Istraži Grey Triggerfish