Come identificare Silver Dollar

Per identificare Silver Dollar (Metynnis argenteus), osserva queste caratteristiche chiave.

Caratteristiche fisiche

Forma del corpo

compressed

Colorazione

Predominantly silvery, often with a metallic sheen. Some individuals may exhibit a faint reddish tint on the fins, particularly the anal fin, or a subtle dark spot behind the operculum, though this is less pronounced than in some other Metynnis species.

Tipo di squame

cycloid

Posizione della bocca

superior

Caratteristiche distintive

Highly compressed, disc-shaped body, Large, reflective scales, Small, upturned mouth, Adipose fin present

Pinna dorsale

Single, relatively short dorsal fin positioned mid-body.

Pinna caudale

Forked caudal fin.

Pinna pettorale

Small, clear pectoral fins.

Pinne distintive

Anal fin is relatively long and extends along the ventral side of the body. Pelvic fins are small and located abdominally. An adipose fin is present between the dorsal and caudal fins.

Consigli per l'identificazione

1. 1

   Body Shape

   Look for the characteristic, almost perfectly circular and extremely compressed body, resembling a silver coin or 'dollar'.

2. 2

   Coloration

   The uniform, bright silver coloration with a metallic sheen is a key identifier. Absence of prominent dark spots or patterns (unlike some other Metynnis species).

3. 3

   Mouth Position

   The small, slightly upturned mouth is indicative of its herbivorous, surface-feeding tendencies.

4. 4

   Fin Structure

   Observe the relatively long anal fin and the presence of an adipose fin, which helps distinguish it from some other disc-shaped characins.

Esplora Silver Dollar