How to Identify Diamond Watchman Goby

To identify Diamond Watchman Goby (Valenciennea puellaris), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

The body is typically whitish to pale yellow, adorned with numerous small, iridescent blue or orange spots that often form horizontal rows along the flanks. A prominent dark spot or ocellus is often present on the first dorsal fin. The fins are generally translucent with some yellow or orange markings.

Scale type

ctenoid

Mouth position

superior

Distinctive features

Elongated, cylindrical body, Large, upward-facing eyes, Prominent blue or orange spots covering the body, Two distinct dorsal fins, Large mouth, Often seen sifting sand through its gills

Dorsal fin

Two dorsal fins; the first is typically taller with a prominent dark spot, and the second is longer and lower.

Tail fin

Rounded to slightly emarginate caudal fin.

Pectoral fin

Large, fan-like pectoral fins.

Distinctive fins

Pelvic fins are fused into a disc-like structure, characteristic of gobies, used for perching on substrates.

Identification Tips

1. 1

   Body Coloration and Spots

   Look for the pale body covered with numerous small, iridescent blue or orange spots. This is the most distinguishing feature.

2. 2

   Dorsal Fin Spot

   A prominent dark spot on the first dorsal fin is often present and can aid in identification.

3. 3

   Behavior

   Observe its sand-sifting behavior, where it takes mouthfuls of sand, sifts out detritus and small invertebrates, and expels the clean sand through its gills.

4. 4

   Burrowing

   They are almost always found near or in their burrows, which they meticulously maintain.

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