Green Melibe (Melibe Viridis) Dendronodit Nudibranchs)© scubaluna/Shutterstock.com
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Quick Take
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The animal in the video is a predatory sea slug called Melibe viridis, a type of nudibranch found in Indonesian waters.
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To feed, it uses a large, expandable oral hood like a net to capture small crustaceans and other tiny prey.
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This sea slug usually crawls along the seafloor, and its dramatic opening “head” movement is part of its feeding behavior.
The video above takes viewers beneath the waters off Bali, Indonesia, where a truly unusual marine animal glides across the seafloor. At first glance, it looks almost unreal — soft, translucent, and…