“…These organisms can be used in biological monitoring studies (Oehlmann & Schulte-Oehlmann, 2003), can act as ecosystem engineers (Fortunato, 2015) and can take part in the functions of ecosystems (Carnegie et al, 2016). However, the productive habitats covering these classes are under the influence of man-made factors, such as the opening of coastal areas to settlement (Von Storch et al, 2015), pollution (Bloch & Klingbeil, 2015), climate change (Burden et al, 2020), mucilage (Tüfekçi et al, 2010;Savun-Hekimoğlu & Gazioğlu, 2021;Aslan et al, 2021b). Among these factors, mucilage formation was observed in the Sea of Marmara in 2020 and reached the Çanakkale Strait and also Gökçeada by the effect of currents and winds.…”