This a survey of literature records for occurrence and taxonomy of zooplankton in the Western Mediterranean, with particular
emphasis on the Alboran Sea. It is intended to give a general background on the fauna, and facilitate identification of specimens
collected or observed. A description of the hydrography of the Alboran Sea is followed by a general account of zooplankton biomass distribution, and more detailed lists of the occurrence of 361 species of medusae, siphonophores, ctenophores, worms,
tunicates and crustaceans in 7 regions of the Western Mediterranean. Bioluminescent properties of the organisms are indicated
where known. An illustrated taxonomic guide provides capsule descriptions and illustrations of 254 of the listed species.