How to Identify Spotted Goby

To identify Spotted Goby (Redigobius macrostoma), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

The body is typically light brown to yellowish-tan, adorned with numerous dark brown to black spots and blotches irregularly distributed across the flanks and fins. A prominent dark spot is often present at the base of the caudal fin. The ventral side is usually lighter.

Scale type

ctenoid

Mouth position

superior

Distinctive features

Relatively large, upward-pointing mouth (macrostoma means 'large mouth'), Two distinct dorsal fins, Pelvic fins fused into a suction cup-like disc, Irregular dark spots and blotches over the body and fins

Dorsal fin

Two dorsal fins; the first dorsal fin has 6-7 spines, and the second dorsal fin has 1 spine and 7-9 soft rays. The first dorsal fin is typically lower than the second.

Tail fin

Rounded to slightly emarginate caudal fin.

Pectoral fin

Pectoral fins are relatively large and rounded, with 15-18 rays.

Distinctive fins

Pelvic fins are completely fused into a prominent, anteriorly directed adhesive disc, characteristic of gobies.

Identification Tips

1. 1

   Mouth Size and Orientation

   Look for a noticeably large mouth that is angled upwards, a key feature implied by its scientific name 'macrostoma'.

2. 2

   Body Pattern

   Observe the irregular dark spots and blotches scattered across the body and fins. This is the primary characteristic for its common name, 'Spotted Goby'.

3. 3

   Pelvic Fins

   Confirm the presence of fused pelvic fins forming a suction cup, a definitive characteristic of gobies.

4. 4

   Dorsal Fins

   Note the two separate dorsal fins, with the first being spiny and the second having soft rays.

Explore Spotted Goby