This short underwater macro film brings together 12 sea slugs and nudibranchs filmed on scuba dives in Indonesia, the Philippines, Fiji, and St. Vincent. In about two minutes, the video highlights the extraordinary color, texture, and form that make sea slugs such compelling subjects for underwater cinematography. From tiny leaf-like sacoglossans to boldly patterned nudibranchs, each clip was selected to show how much variety exists across the world’s best macro diving destinations. Use the video and species timestamps below to identify each sea slug featured in the film and explore where each subject was filmed.
The Indo-Pacific Epicenter
In biodiversity hotspots like Lembeh, Anilao, and the Visayas, the density of nudibranch species can feel endless on a single dive. Many of the Indo-Pacific clips in this film were shot on black-sand “muck” sites, using a tripod or carefully braced fin tips to keep the camera rock-steady at high magnification. Subjects like Costasiella kuroshimae often measure just a few millimeters, so small movements or surges can easily ruin a shot.
Caribbean & South Pacific Gems
The Caribbean offers a different palette of “macro gems.” St. Vincent, featured prominently at the 1:25 mark, is a prized destination for divers seeking unique sea slugs that aren’t found in the Pacific. Similarly, Fiji provides stunning reef backdrops that make macro subjects pop against the vibrant soft corals.
Macro Video Techniques Used in This Film
Most clips in this sea slug video were filmed with a dedicated macro lens, small apertures for extra depth of field, and dual video lights to bring out the true colors underwater. I favored manual focus and slow, controlled moves so the viewer can study the nudibranch’s rhinophores, gills, and texture without distraction. For especially tiny subjects, I locked the focus and gently rocked the housing until the critical details popped into focus in the viewfinder.
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