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2-4m
A coral head had been struck by a boat or something and one of the corals had been split open revealing two sponges. This observation is for the orange sponge that’s pale in the inside. Not M. laevis.

Three different boring sponges side by side. Probably Pione vastifica (orange), Cliona celata s.l. (yellow) and an unidentified blue species. I don't know of a blue clionaid species in the Adriatic.
@blue_lotus @frederic-andre @francoisroche

I believe this is the species shown as Sigmadocia amboinensis in Colin & Arneson (1995), #126, p. 42. According to WoRMS, Sigmadocia was transferred entirely to Haliclona. However, Allen & Steene (1994) show a species they label as Haliclona amboinensis that is definitely not this species. My observations 197045435 and 197045430 seem to match that one.

I believe this is the species shown as Sigmadocia amboinensis in Colin & Arneson (1995), #126, p. 42. According to WoRMS, Sigmadocia was transferred entirely to Haliclona. However, Allen & Steene (1994) show a species they label as Haliclona amboinensis that is definitely not this species. My observations 197045435 and 197045430 seem to match that one.