Come identificare Triotto

Per identificare Triotto (Rutilus aula), osserva queste caratteristiche chiave.

Caratteristiche fisiche

Forma del corpo

elongated

Colorazione

Silvery flanks, darker greenish-brown back, and a whitish belly. Fins are often reddish, especially the pectoral, pelvic, and anal fins, becoming more intense during breeding season. A distinct dark spot is usually present at the base of the dorsal fin.

Tipo di squame

cycloid

Posizione della bocca

subterminal

Caratteristiche distintive

Relatively small mouth, slightly subterminal., Large, cycloid scales., Often a reddish iris., Lateral line complete, with 39-43 scales.

Pinna dorsale

Short, with 3 unbranched and 8-9 branched rays, typically originating slightly behind the pelvic fin origin.

Pinna caudale

Deeply forked, with pointed lobes.

Pinna pettorale

Relatively short, with 15-17 rays.

Pinne distintive

All fins, particularly the paired fins and anal fin, often exhibit a reddish hue, which intensifies during the breeding season.

Consigli per l'identificazione

1. 1

   Body Shape and Size

   Slender, elongated body, typically reaching 15-25 cm in length, with a maximum recorded size of around 30 cm.

2. 2

   Coloration

   Silvery body with a darker back and reddish fins. Look for the distinct dark spot at the base of the dorsal fin.

3. 3

   Mouth Position

   Small, slightly subterminal mouth, distinguishing it from species with terminal or inferior mouths.

4. 4

   Lateral Line Scales

   Count the scales along the lateral line; Rutilus aula typically has 39-43 scales.

5. 5

   Fin Ray Count

   Dorsal fin with 3 unbranched and 8-9 branched rays; anal fin with 3 unbranched and 8-9 branched rays.

Esplora Triotto