Actually I've seen this species three times within two weeks in 2017. It was always in Silo, between the "dog beach" and the marina, depth somewhere between 1-2 metres. I looked beneath a lot of rocks in search for Lepadogaster. Every time the goby was gone faster than I could take a second picture. I think I've seen it a fourth time (Silo Urokliwa Zatoczka, swimming freely), gone like a flash, couldn't even take a first picture ...