Come identificare Castagnola nera

Per identificare Castagnola nera (Chromis limbata), osserva queste caratteristiche chiave.

Caratteristiche fisiche

Forma del corpo

compressed

Colorazione

Adults are typically dark brown to black, often with a bluish or purplish sheen, especially when observed in natural light. The margins of the dorsal, anal, and caudal fins are often edged with a narrow, iridescent blue or white band, which can be more prominent in juveniles and during breeding. Juveniles are generally lighter, often with a more pronounced blue tint.

Tipo di squame

ctenoid

Posizione della bocca

terminal

Caratteristiche distintive

Dark body coloration with iridescent fin margins, Deeply forked caudal fin, Relatively large eyes, Small, terminal mouth

Pinna dorsale

Single dorsal fin with 13-14 spines and 10-12 soft rays. The spiny portion is longer than the soft-rayed portion.

Pinna caudale

Deeply forked caudal fin, with pointed lobes.

Pinna pettorale

Pectoral fins are relatively large and transparent, with 18-20 rays.

Pinne distintive

The iridescent blue or white edging on the dorsal, anal, and caudal fins is a key distinguishing feature, particularly in contrast to the dark body.

Consigli per l'identificazione

1. 1

   Coloration

   Look for the overall dark brown to black body color, often with a subtle blue or purple iridescence. The most reliable feature is the narrow, bright blue or white margin on the dorsal, anal, and caudal fins.

2. 2

   Fin Shape

   Note the deeply forked caudal fin and the relatively long spiny portion of the dorsal fin.

3. 3

   Behavior

   Often observed in schools, hovering above rocky reefs or darting into crevices when threatened.

4. 4

   Size

   Adults typically reach a maximum standard length of 12-15 cm (4.7-5.9 inches).

Esplora Castagnola nera