How to Identify Gray Angelfish

To identify Gray Angelfish (Pomacanthus arcuatus), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Adults are predominantly gray to brownish-gray, often with a darker blotch on the pectoral fin base and a white mouth. The scales have dark centers, creating a reticulated pattern. Juveniles are strikingly different, black with five vertical yellow or white bars, a yellow caudal fin, and a yellow band on the snout. As they mature, the bars fade, and the body gradually turns gray.

Scale type

ctenoid

Mouth position

terminal

Distinctive features

Strong preopercular spine at the angle of the gill cover, characteristic of angelfish., Rounded caudal fin in adults., Dramatic color change from juvenile to adult., Thick, disc-shaped body.

Dorsal fin

Single, long dorsal fin with 9-11 spines and 29-33 soft rays. The soft-rayed portion is elongated posteriorly.

Tail fin

Rounded caudal fin in adults; yellow in juveniles.

Pectoral fin

Large, rounded pectoral fins, often with a dark blotch at the base in adults.

Distinctive fins

Anal fin with 3 spines and 23-25 soft rays, similar in shape to the soft dorsal fin.

Identification Tips

1. 1

   Adult Coloration

   Look for the uniform gray body with dark-centered scales creating a net-like pattern, and a white mouth. The dark spot at the pectoral fin base is also a good indicator.

2. 2

   Juvenile Coloration

   The black body with five prominent vertical yellow or white bars is unmistakable for juveniles. The yellow caudal fin and snout band are also key.

3. 3

   Body Shape

   The deep, compressed body shape is characteristic of angelfish, distinguishing it from butterflyfish.

4. 4

   Preopercular Spine

   The presence of a strong spine on the lower margin of the preoperculum (gill cover) confirms it as an angelfish.

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