Come identificare Common Goldfish

Per identificare Common Goldfish (Carassius auratus), osserva queste caratteristiche chiave.

Caratteristiche fisiche

Forma del corpo

rounded

Colorazione

Highly variable; wild forms are olive-green to brownish-grey. Domesticated forms range from red, orange, yellow, white, black, and combinations thereof. Scales can be metallic, nacreous (matte), or matte (without iridescence).

Tipo di squame

cycloid

Posizione della bocca

terminal

Caratteristiche distintive

Lack of barbels (distinguishes from common carp), Serrated dorsal and anal fin spines (present in wild type and some common varieties, reduced or absent in some fancy varieties), Highly variable body and fin shapes in domesticated forms (e.g., fantail, oranda, ryukin, celestial eye)

Pinna dorsale

Single, long dorsal fin, often with a serrated spine in wild types. Can be highly modified in fancy varieties (e.g., short, high, or absent in some).

Pinna caudale

Typically forked in wild types and common goldfish. Can be highly modified, ranging from deeply forked to short, rounded, or multiple lobes (e.g., fantail, butterfly tail) in fancy varieties.

Pinna pettorale

Paired, typically rounded or slightly pointed.

Pinne distintive

Pelvic fins are paired and abdominal. Anal fin is single, often with a serrated spine in wild types, can be paired or highly modified in fancy varieties.

Consigli per l'identificazione

1. 1

   Barbels

   Goldfish (Carassius auratus) lack barbels around their mouth, which distinguishes them from the Common Carp (Cyprinus carpio) which has two pairs of prominent barbels.

2. 2

   Dorsal Fin Spine

   Wild-type goldfish and common goldfish typically have a strong, serrated spine at the front of their dorsal fin. This can be a key identifier, though some fancy varieties may have reduced or absent spines.

3. 3

   Body Shape and Coloration

   While highly variable, the absence of barbels combined with the typical rounded body shape and often vibrant coloration (in domesticated forms) helps distinguish them from other cyprinids. Wild forms are more slender and olive-brown.

4. 4

   Lateral Line

   The lateral line is complete and slightly curved, with 25-31 scales.

Esplora Common Goldfish