How to Identify Moluccan Damselfish

To identify Moluccan Damselfish (Pomacentrus moluccensis), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Predominantly bright yellow over the entire body, including fins. Some individuals may exhibit a faint dusky spot at the base of the pectoral fin or a slightly paler belly. Juveniles are typically more intensely yellow.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Uniform bright yellow coloration, Small size, typically reaching 6-8 cm (2.4-3.1 inches) in total length, Relatively deep body for a damselfish, Small, terminal mouth

Dorsal fin

Single dorsal fin with 13 spines and 13-15 soft rays. The spinous and soft-rayed portions are continuous.

Tail fin

Caudal fin is emarginate (slightly forked) to truncate.

Pectoral fin

Pectoral fins are clear to yellowish, relatively large and rounded.

Distinctive fins

Anal fin with 2 spines and 13-15 soft rays. Pelvic fins are yellow.

Identification Tips

1. 1

   Overall Coloration

   The most distinguishing feature is its uniform, bright yellow body and fins. This sets it apart from many other damselfish species that have more complex patterns or different base colors.

2. 2

   Size and Shape

   Its small size (up to 8 cm) and compressed, relatively deep body are characteristic. The caudal fin is typically slightly emarginate.

3. 3

   Habitat Association

   Often observed in close association with branching corals, using them for refuge. This microhabitat preference can aid in identification.

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