How to Identify Convict Damsel

To identify Convict Damsel (Chrysiptera cyanea), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Males are typically brilliant blue with a distinct orange or yellow caudal fin, sometimes extending onto the posterior dorsal and anal fins. Females are generally a uniform bright blue, though some populations exhibit entirely yellow females. Juveniles are bright blue. Some regional variations exist, including individuals with black spots or markings.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Bright blue body coloration, Sexually dimorphic caudal fin coloration (males often orange/yellow), Small size, typically reaching 6-7 cm (2.4-2.8 inches) in total length

Dorsal fin

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

Tail fin

Forked or emarginate caudal fin. Males often have an orange or yellow caudal fin.

Pectoral fin

Transparent to slightly yellowish, rounded.

Distinctive fins

Pelvic fins are typically blue and extend slightly beyond the anal fin origin.

Identification Tips

1. 1

   Coloration

   Look for the vibrant blue body. Males are distinguished by their orange or yellow caudal fin, which is a key identifier.

2. 2

   Size

   Small size, rarely exceeding 7 cm (2.8 inches), helps differentiate it from larger damselfish species.

3. 3

   Habitat

   Typically found in shallow reef environments, often darting among corals or rocks.

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