Sand goby spot at the rear of the first dorsal fin, ringed with white. The fish has a slender body, and the head is about a quarter of the total length. The sand goby has two dorsal fins with a wider gap between them than the common goby ("Pomatoschistus microps"), the anterior one consisting of six soft spines and the posterior one eight to eleven 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 rather smaller than those of the common goby. The caudal fin is
Sphinx blenny Sphinx blenny The Sphinx blenny ("Aidablennius sphynx") is a species of combtooth blenny, and the only species in the genus "Aidablennius". It was described by Achille Valenciennes in 1836, originally under the genus "Blennius", and was later reassigned under ""Aidablennius"" by Gilbert Percy Whitley in 1947. It is a subtropical blenny known from Morocco, in the eastern Atlantic Ocean, and also from the Mediterranean and Black Seas. Sphinx blennies inhabit shallow, rocky waters in the littoral zone, with sunlight exposure. They feed primarily on benthic algae, weeds and invertebrates. Sphinx blennies can measure up to long in total length. In