Like Aphia minuta and Crystallogobius linaris this is a pelagic species. It is, like the species mentioned, largely transparent. The dark spot at the base of the caudal fin is clearly visible. The four dark horizontal spots on the sides of the body are characteristic as are the bright spots on the side and back. The space between the first and second dorsal fins is wide and has notable big eyes. Spawning takes place Ferreri around June. In the other months, especially between December and April, they swim in groups, sometimes mixed with Aphia minuta.

This slender fish grows up to 3 to 4 cm.

Transparent with a dark spot on the base of the caudal fin and horizontitale row of four dark spots on body side. Furthermore, there are bright spots on the body.

Usually free swimming above soft bottoms, to a depth of 15 meters.

Only in the western Mediterranean and the Adriatic Sea.