About Pomatoschistus minutus (Pallas, 1770)
This species, commonly known as the sand goby, has a wider gap between its two dorsal fins than the related common goby (Pomatoschistus microps). Its anterior dorsal fin contains six soft spines, while its posterior dorsal fin has 8 to 11 soft rays. The pelvic fins are fused with the anal fins. There are 58 to 72 scales along the lateral line, and these scales are noticeably smaller than the scales of the common goby. The caudal fin has a rounded shape. Males have a prominent dark spot on the anterior dorsal fin, and both sexes have a black patch on the caudal peduncle. The sand goby's overall body color is sandy brown, with indistinct dark blotches and reticulated patterning across its dorsal surface, and dark striations on its pale fins. During the breeding season, male sand gobies darken in color, and their fins become more intensely colored. The species reaches an average adult length of 4 to 5 cm, which equals 1.6 to 2.0 inches.
