In situ predation of Boops boops (Linnaeus, 1758) on the rare hydrozoan, Geryonia proboscidalis (Forsskål, 1775), in the Aegean Sea, Turkey

Abstract

Most data of fish feeding on cnidarians were obtained from the studies on gut contents of the predators rather than in situ observations. The feeding observation of Boops boops on Geryonia proboscidalis was observed in September 2013, in Sığacık Bay, the Aegean Sea, Turkey. The four bogue specimen was approximately 10-12 cm in total length (TL), and two out of six tentacles and tip of oral arm of G. proboscidalis was extirpated before the incidence. B. boops individuals directly attacked the intact tentacles of the hydrozoan, and extirpated rest of them in a minute. The present observation is also the northernmost record of G. proboscidalis from the Turkish coasts.

The First Record of Geryonia proboscidalis (Forskål, 1775), (Cnidaria: Hydrozoa) on the Coasts of Gökçeada, the Aegean Sea, Turkey

“…G. proboscidalis is distributed in the Atlantic, Indo-Pacific, and Mediterranean and prefers warm waters, living in the surface areas of tropical and subtropical seas (Vanucci, 1957). G. proboscidalis has previously been recorded in Boncuk Bay, (Aegean Sea), in Iskenderun Bay (Mediterrenean Sea) and in Sığacık Bay (Aegean Sea) respectively on the coasts of Turkey (Gülşahin, Tarkan, & Bilge, 2013;Ergüden, Turan, Çevik, & Uygur, 2014;Akçınar, 2017). The present study indicates that the distribution of G. proboscidalis is spreading northerly.…”