Planktonic Ctenophora of the Madeira Archipelago (Northeastern Atlantic) Author Gueroun, Sonia Km MARE - Marine and Environmental Sciences Centre, Agência Regional para o Desenvolvimento da Investigação Tecnologia e Inovação (ARDITI), Madeira, Portugal. & Maricultura Centre of Calheta, Calheta, Madeira, Portugal. Author Schäfer, Susanne MARE - Marine and Environmental Sciences Centre, Agência Regional para o Desenvolvimento da Investigação Tecnologia e Inovação (ARDITI), Madeira, Portugal. & GEOMAR Helmholtz Centre for Ocean Research Kiel, Germany. Author Gizzi, Francesca MARE - Marine and Environmental Sciences Centre, Agência Regional para o Desenvolvimento da Investigação Tecnologia e Inovação (ARDITI), Madeira, Portugal. Author Álvarez, Soledad MARE - Marine and Environmental Sciences Centre, Agência Regional para o Desenvolvimento da Investigação Tecnologia e Inovação (ARDITI), Madeira, Portugal. Author Monteiro, João Gama MARE - Marine and Environmental Sciences Centre, Agência Regional para o Desenvolvimento da Investigação Tecnologia e Inovação (ARDITI), Madeira, Portugal. Author Andrade, Carlos Maricultura Centre of Calheta, Calheta, Madeira, Portugal. & Interdisciplinary Centre of Marine and Environmental Research (CIIMAR / CIMAR), University of Porto, Portugal. Author Canning-Clode, João MARE - Marine and Environmental Sciences Centre, Agência Regional para o Desenvolvimento da Investigação Tecnologia e Inovação (ARDITI), Madeira, Portugal. & Smithsonian Environmental Research Center, Edgewater, USA. text Zootaxa 2021 2021-12-13 5081 3 433 443 journal article 2995 10.11646/zootaxa.5081.3.7 3af52a88-d8ac-4def-805e-56225b3db803 1175-5326 5775861 B646A8A3-A95D-4714-B767-1154BBC32A49 Cestum veneris Lesueur, 1813 ( Table 1 , Fig. 4A ) Synonymes: Cestus pectinalis Bigelow, 1904 ; Cestus veneris Chun, 1879 Examined material: Southeast Porto Santo Island , 33°03’05”N 16°20’09”W . One specimen was observed at 12 m depth , near the sand floor, during a SCUBA dive . Description: Body laterally expanded and flattened, long and ribbon-like, around 1 m in width, transparent. Presence of purplish-black pigment on its wingtips (brown-yellowish colour on the video record due to the light spectrum gradient) ( Fig. 4A 2 ). Remark: While no individual was clearly photographed, some reports indicate C. veneris occurrence in the southern part of the Madeira Island (Peter Wirtz pers. comm ).