First record of the common sun star Crossaster papposus (L., 1767) in the Baltic Sea in over 100 years.

However, in 2019, saline bottom water body with a maximum salinity over 20 was detected in the Fehmarn Belt in early February; weak barotropic inflows occurred in the Baltic Sea in March and April, also bringing saline waters from the North Sea ([19]). Keywords: Crossaster papposus; Fehmarn Belt; protected species; monitoring data; underwater imaging approach EN Crossaster papposus Fehmarn Belt protected species monitoring data underwater imaging approach 143 148 6 07/18/22 20220601 NES 220601 GLOSSARY IOW - Leibniz Institute for Baltic Sea Research Warnemünde MPA - Marine Protected Area 1. Furthermore, I C. squamatus i has never been recorded in the German parts of the North Sea or the Baltic Sea and results of several marine surveillance programs (MAREANO, BIOICE, BIOFAR) indicate that I C. squamatus i occurs at the shelf break in colder waters at a depth of 100 to 1600 m ([18]; [21]). The common sun star I C. papposus i was found in both cases at the Natura 2000 site "Fehmarn Belt" (EU-Code: DE 1332-301) in the south-western Baltic Sea (54°34.41934'N; 10°50.06339'E and 54°35.48544'N; 10°54.82932'E; Fig. [Extracted from the article]