A single male specimen of Thysanoteuthis rhombus was caught using a hand squid jig just after dusk on 26 December 2006, 15 metres offshore Dolfin Islet (44°41′N 14°41′E) at a depth of 10 m in the eastern part of the northern Adriatic Sea. This is the first record of this species in the Adriatic Sea and the northernmost capture in the Mediterranean Sea.