How to Identify Pearly Razorfish

To identify Pearly Razorfish (Xyrichtys margaritaceus), look at these key features.

Physical Characteristics

Body shape

compressed

Coloration

Males typically exhibit a greenish-blue to iridescent blue body with a series of pearly white spots or lines along the flanks, often with a prominent dark spot or bar behind the pectoral fin. The head may have iridescent blue or green markings. Females are generally duller, often reddish-brown to pinkish-orange, with less distinct markings, sometimes with a few scattered white spots. Juveniles resemble females but may be even more cryptic.

Scale type

cycloid

Mouth position

terminal

Distinctive features

Laterally compressed body, Steeply sloped forehead, Ability to rapidly bury into sand, Sexual dimorphism in coloration

Dorsal fin

Dorsal fin continuous, with 9 spines and 12-13 soft rays. The first two dorsal spines are often elongated in males.

Tail fin

Caudal fin truncate to slightly rounded.

Pectoral fin

Pectoral fins relatively small and rounded.

Distinctive fins

Pelvic fins are small and located ventrally.

Identification Tips

1. 1

   Body Shape

   Look for the highly compressed, razor-like body profile, especially the steep forehead.

2. 2

   Coloration (Males)

   Identify males by their iridescent blue-green body with pearly white spots/lines and often a dark spot behind the pectoral fin.

3. 3

   Coloration (Females/Juveniles)

   Females and juveniles are typically reddish-brown to pinkish-orange, often with less distinct markings.

4. 4

   Behavior

   Observe their characteristic behavior of rapidly diving headfirst into the sand when startled or for resting.

5. 5

   Habitat

   They are almost exclusively found over open sandy or rubble-sand areas.

Explore Pearly Razorfish