KOCAELI, TURKIYE - OCTOBER 21: Sea pens (Veretillum cynomorium) is seen at a depth of 30 meters of Izmit Bay in Kocaeli, Turkiye on October 21, 2024. Sea pens, endemic to the Mediterranean, stand out with their delicate and elegant structures and attract attention by shining light in dark environments. These creatures, which are soft coral species, usually form dense populations in deep waters and feed by opening their polyps. Mehtap Ciftci / Anadolu/ABACAPRESS.COM