Euphausiids of the Red Sea collected in summer 1966 by R. V. ?Academician S. Vavilov?

Abstract

The Red Sea is inhabited by a rich fauna which is of great economic importance to the fisheries of surrounding countries. In contrast to this importance, little is known about the plankton communities. This study presents information on the occurrence, distribution and abundance of euphausiid species of the Red Sea. A total of 22 species was found; 10 of these in the Red Sea proper. Most of these have inhabited the Red Sea by emigrating from the Aden Gulf; however 2 or 3 of them are endemic (Euphausia sanzoi, Pseudeuphausia colosi). Bathypelagic species are absent. Sex ratios and diurnal vertical migrations are discussed.