Come identificare Lookdown

Per identificare Lookdown (Selene vomer), osserva queste caratteristiche chiave.

Caratteristiche fisiche

Forma del corpo

compressed

Colorazione

Overall brilliant silvery, highly reflective, often with iridescent blue or green hues dorsally. No distinct bars or spots on the body. Fins are translucent to silvery.

Tipo di squame

cycloid

Posizione della bocca

terminal

Caratteristiche distintive

Extremely deep and laterally compressed body, almost disc-like in adults., Steeply concave head profile, giving the impression of the fish 'looking down'., Long, filamentous anterior rays of the dorsal and anal fins in juveniles, which shorten with age., Small, protractile mouth.

Pinna dorsale

Two dorsal fins; the first with 8 spines (the first 2-3 are very short and embedded in adults), the second with 1 spine and 20-23 soft rays. The anterior soft rays are greatly elongated in juveniles.

Pinna caudale

Deeply forked caudal fin.

Pinna pettorale

Long and falcate (sickle-shaped) pectoral fins.

Pinne distintive

Anal fin with 2 detached spines followed by 1 spine and 16-18 soft rays. The anterior soft rays are also greatly elongated in juveniles, mirroring the dorsal fin.

Consigli per l'identificazione

1. 1

   Body Shape

   The most striking feature is its extremely deep, compressed, and almost rhomboidal body shape, which is much deeper than it is long.

2. 2

   Head Profile

   The concave, 'lookdown' head profile is unique among most carangids and is a key identifier.

3. 3

   Coloration

   Its uniform, brilliant silvery coloration with no distinct markings helps distinguish it from other similar-shaped fish.

4. 4

   Juvenile Fin Rays

   Young individuals have exceptionally long, filamentous anterior dorsal and anal fin rays, which are a clear diagnostic feature.

Esplora Lookdown