Thus, using the main morphological features, we can subdivide three species of the genus Beroe, which we found in the Gulf of Trieste: Phylum Ctenophora Eschscholtz 1829; Order Beroida Eschscholtz 1829; Genus Beroe Browne 1756. We provide descriptions that may useful for the identification of these species for researchers, even those not familiar with ctenophore morphology.