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Closeup of a  brightly colored Nudibranch crawling  on corals
Flabellina affinis, underwater shot.
Colourful Soft Coral growth under Busselton Pier, Western Australia, Australia
Bullock's Hypselodoris Hypselodoris bullockii occurs widespread in the tropical Indo-West Pacifix, max. length 7cm. \nThis Sea Slug or dorid nudibranch has been mistaken for at least eight other species. \n\nThis specimen was encountered in the Lembeh Strait, Indonesia\n1°27'38.166 N 125°13'34.284 E at 18m depth
Sea Slug, Dorid Nudibranch, Crested Nembrotha, Nembrotha cristata, Coral Reef, Lembeh, North Sulawesi, Indonesia, Asia
Sea Life. Nudibranch is a member of Nudibranchia, a group of soft-bodied, marine gastropod mollusks which shed their shell after their larval stage.  Very shallow DOF. Macro (close-up)
The Red Sea is home to a diverse array of marine life, including the striking nudibranchs, which are soft-bodied, brightly colored sea slugs. Known for their incredible array of colors and intricate patterns, nudibranchs are a favorite subject for underwater photographers and divers exploring the region’s coral reefs.\n\nNudibranchs are gastropods, but unlike snails, they lack a protective shell. Instead, they display vibrant hues ranging from brilliant oranges, pinks, and purples to electric blues and yellows. This vivid coloration often serves as a warning to predators of their toxicity or unpalatability, though some species are harmless.\n\nIn the Red Sea, nudibranchs can be found on the reefs, where they feed on sponges, algae, or other small invertebrates. Species like the Spanish dancer, known for its large size and flowing red body, and the blue dragon (Glaucus atlanticus), with its shimmering blue hues, are particularly popular with divers. These fascinating creatures are typically found in shallow waters but can also be spotted in deeper areas of the reef.\n\nThe Red Sea's clear, warm waters and healthy coral ecosystems provide an ideal environment for these colorful creatures, making it a prime location for diving and snorkeling enthusiasts eager to discover the vibrant world of nudibranchs.
Underwater photography of tropical reef  species in Papua New Guinea
Nudibranch under the jetty at Mabul island, Malaysia
Colorful sea cucumber-like corals.
The image shows a vibrant Solar powered nudi (Phyllodesmium longicirrum) crawling gracefully in the crystal-clear waters of a tropical coral reef. This stunning sea slug is known for its unique ability to derive energy from sunlight using symbiotic algae in its body. Its translucent body is adorned with beautiful patterns of blue, purple, and orange, making it a true underwater jewel.
Phyllodesmium longicirrum, the Long-cirri or Solar-powered Phyllodesmium occurs in the tropical Indo-West Pacific. The species is a very spectacular aeolid, which has evolved a symbiotic relationship with zooxanthellae. It is exceptionally large, often more than 12, max. 14cm long, and the cerata have evolved into large solar paddles to maximise the animal's ability to farm the plants in its body. It is known to feed on the soft-coral Sarcophyton. \nTwo specimens meet, the smaller at the left.\nLembeh Strait, Indonesia \n1°28'47.814 N 125°15'1.26 E at 14m depth
Sea Slug, Bullock's Hypselodoris, Hypselodoris bullocki, Dorid Nudibranch, Bunaken National Marine Park, Bunaken, North Sulawesi, Indonesia, Asia
Abstract. Sea life Nudibranch Underwater beauty Scuba diver point of view
Gabriela's Tambja, Dorid Nudibranch
Closeup of a  brightly colored Nudibranch crawling  on corals
Macro underwater photography in Anilao in the Philippines
Eye level with Anna's Nudibranch (Chromodoris annae). Photographed in Lembeh Strait, Indonesia.
The Nudibranch Tryon's Hypselodoris Hypselodoris tryoni (ex. Risbecia tryoni) occurs in the tropical Indo-Pacific Ocean from Tanzania to the Society Islands and Indonesia to Japan and the Philippines, max. length 10cm. This species, like all the members of the order Nudibranchia, are simultaneous hermaphrodites with this mating behavior: Both individuals darts their penis toward each other to induce one to act as a male and the other as the female. The victorious one to penetrate the body wall is the dominant male. \nThis specimen was encountered in the Lembeh Strait, Indonesia. \n1°27'39.69 N 125°14'33.342 E at 17m depth
Illuminated Blue striped nudibranch on coral reef against a dark background
A Chromodoris magnifica nudibranch on a colorful reef in Indonesia.
Close-up of a Nudibranch (Doriprismatica atromarginata) on a tropical coral reef in the Indo-Pacific
Underwater photography beauty deep sea, red ascidiacea tunicate Halocynthia papillosa, yellow coral  orange sponge fish reef Sea life.   Scuba diver point of view
Ardeadoris cf. averni Nudibranch
Gabriela's Tambja, Dorid Nudibranch
BLACKSPOT NUDIBRANCH
The Sea Slug Halgerda batangas occurs in the tropical western Pacific, singly or in pairs on coral and rocky reefs amongst sand and rubble areas in 5 to 30 m depth, max. length 7 cm.  \nThe species feeds on hydroids, coral, sponges and anemones.  \nThis specimen was encountered in the Lembeh Strait, Indonesia\n1°27'15.486 N 125°13'25.578 E at 21m depth
under sea photo
Phyllidia varicosa nidubranch under the sea in Koh Tao diving, Thailand
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