UK Record Weights from
MAFF Minimum Size: Shore:
Medium-sized goby (a family of small fishes with a notorious reputation of being difficult to differentiate, characterised by a pair of dorsal fins, and a pelvic fin fused into a weak suction cup). The first dorsal fins are elongate, especially the third and/or fourth spine, in this species (but not in Gobius paganellus) during the breeding season. Cream, fawn or sandy with black blotches, sometimes it will appear black. In breeding coloration the elongate first dorsal fin is distinctive.
It appears that the elongate first dorsal fin is not always present.
This has suggested four possibilities, i.e. misidentification, hybrids, a
third species, or that the fish loses (or fails to develop) the elongated
The big black smudges on the side of the body obscure the smaller spots and
are diagnostic. The absence of large blotches indicate the similar Rock Goby.
32-45 scales on the lateral line, less than the Rock Goby.
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