Songda Cai on Instagram: "As female argonauts can grow a very thin shell made of calcium, it is also called paper nautilus, belongs to Cepholapoda, Octopoda. They are pelagic animals and rarely seen on the reefs. As shown in the photo, the female argonaut is swimming in it’s own shell, trying to find a prey like Mollusca. Black water at Balayan Bay #macrophotography #underwaterworld #nature #underwaterphoto #scubadiving #diving #anilao #anilaophoto #scubaphoto #seacam #marinelife #uwmacro #uwmacrophotographer #blackwater #nikond850 #blackwaterdiving #blackwaterphotography"

Songda Cai shared a post on Instagram: "As female argonauts can grow a very thin shell made of calcium, it is also called paper nautilus, belongs to Cepholapoda, Octopoda. They are pelagic animals and rarely seen on the reefs. As shown in the photo, the female argonaut is swimming in it’s own shell, trying to find a prey like Mollusca. Black water at Balayan Bay #macrophotography #underwaterworld #nature #underwaterphoto #scubadiving #diving #anilao #anilaophoto #scubaphoto #seacam #marinelife #uwmacro #uwmacrophotographer #blackwater #nikond850 #blackwaterdiving #blackwaterphotography". Follow their account to see 791 posts.