Come identificare Pike-perch

Per identificare Pike-perch (Sander lucioperca), osserva queste caratteristiche chiave.

Caratteristiche fisiche

Forma del corpo

torpedo

Colorazione

Dorsal side typically greenish-grey to brownish-grey, fading to silvery-white on the flanks and belly. Flanks often exhibit 8-12 indistinct, dark vertical bars, which are more pronounced in younger individuals. Fins are dusky, with the dorsal and caudal fins often mottled or spotted.

Tipo di squame

ctenoid

Posizione della bocca

terminal

Caratteristiche distintive

Two distinct dorsal fins: the first spiny, the second soft-rayed., Large, prominent canine teeth in both jaws, interspersed with smaller, conical teeth., Large, glassy eyes with a reflective tapetum lucidum, adapted for low-light vision., Operculum (gill cover) ends in a sharp spine.

Pinna dorsale

Two dorsal fins; the first is spiny with 13-17 strong spines, the second is soft-rayed with 18-22 soft rays. The two fins are distinctly separated.

Pinna caudale

Moderately forked caudal fin with 17-19 rays.

Pinna pettorale

Pectoral fins are relatively small, positioned low on the body, with 13-16 rays.

Pinne distintive

Pelvic fins are thoracic, located directly below the pectoral fins, with one spine and five soft rays. Anal fin has 2-3 spines and 10-14 soft rays.

Consigli per l'identificazione

1. 1

   Body Shape

   Elongated, torpedo-shaped body, more slender than a typical perch but less so than a pike.

2. 2

   Dorsal Fins

   Presence of two clearly separated dorsal fins: a spiny anterior fin and a soft-rayed posterior fin.

3. 3

   Teeth

   Distinctive large canine teeth visible in the jaws, a key predatory adaptation.

4. 4

   Eyes

   Large, somewhat glassy eyes with a reflective layer (tapetum lucidum) that aids vision in low light conditions, giving them a characteristic 'glow' in certain light.

5. 5

   Coloration

   Greenish-grey to brownish-grey back, silvery sides, and often faint vertical bars on the flanks, especially in younger fish.

Esplora Pike-perch