Photos 4,5 & 6 with larger Moerella donacina found nearby.
Among debris shaken from nets & fishing gear in the harbour.
http://www.idscaro.net/sci/04_med/class/fam5/species/gari_costulata1.htm
First two photos after and before some minimal cleaning with water & brush.
Photos 4,5 & 6 with smaller pink shell found nearby for comparison.
Among debris shaken from nets & fishing gear in the harbour.