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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)
Ardeadoris cf. averni Nudibranch
Two Mexichromis katalexis Nudibranchs. Ambon, Indonesia
Lined Nembrotha Nembrotha lineolata occurs widespread in the tropical Indo-West Pacific, max. length 7cm. \nNembrotha lineolata has been observed feeding on tunicates. It can insert its extensible oral tube through the tunicate's siphon and suck out the soft interior.\nTriton Bay, Indonesia 3°54'15.606 S 134°6'47.136 E at 14m depth
A nudibranch during feeding in Gökova gulf in Turkey
Gabriela's Tambja, Dorid Nudibranch
PG Island, Oriental Mindoro Province, Philippines - Close-up of marine life
Phidiana hiltoni is a species of sea slug, an aeolid nudibranch, a shell-less marine gastropod mollusc in the family Facelinidae.  Hilton's Aeoli or Hilton's Nudibranch. Duxbury Reef State Marine Conservation Area; Marin County; California.
Beautiful nudibranch making its way across healthy coral reef
Sea life, close up, macro   Beautiful Purple - hot pink Nudibranch. Underwater beauty Scuba diver point of view. Underwater photo.
A colorful white gypsy nudibranch crawls across the sandy bottom at night.
Goniobranchus reticulatus occurs in the tropical Western Pacific Ocean on moderately shallow reefs, frequently under coral rubble, max. length 6cm. \nGoniobranchus reticulatus is a much-discussed species with a lot of mis-ID. \nIn general Goniobranchus reticulatus has a reddish-brown mantle and a white foot that is visible most of the time. The rhinophore stalks translucent with\nlamellae edged opaque white.\nwith opaque white spots\nTriton Bay, Indonesia \n3°54'52.062 S 134°7'21.384 E at 11m depth
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.
Gabriela's Tambja, Dorid Nudibranch
Goniobranchus kuniei is a species of  sea slug, a dorid nudibranch, in the family Chromodorididae. Goniobranchus kuniei has a splash of dark spots turning to pale blue on a golden mantle. There is a double border to the mantle of purple and blue. The length of this seaslug can be up to 40 mm.
Colorful sea cucumber-like corals.
Costasiella usagi, also known as the rabbit sea slug, is a species of sacoglossan sea slug, a shell-less marine opisthobranch gastropod mollusk in the family Costasiellidae. It is notable for its ability to incorporate chloroplasts from the algae it eats into its own tissues, allowing it to photosynthesize. This makes Costasiella usagi one of only a few animals known to be able to perform photosynthesis.\n\nCostasiella usagi is a small sea slug, typically measuring only a few millimeters in length. It has a translucent body with a white or cream-colored head and foot. The cerata, or \
Sea life Nudibranch Underwater beauty Scuba diver point of view
Armina sp. Nudibranch. Sea slug
The Nudibranch Tryon's Hypselodoris Hypselodoris 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. This specimen was encountered at the Iro Wreck. The oil tanker Iro, a 143 meter wreck since March 1944, WWII, was ordered by the Japanese Navy during the 1920´s building programs. Although heavily overgrown with black coral and sponges, the torpedo hole is still clearly visible. The hull of the wreck stands upright between 15 m and 36 m water depth, the masts reach into shallow water. Palau, Iro Wreck 7°17'39.7 N 134°25'15.18 E at 21m depth
Dumaguete, Philippines - Diving and Undersea Life
A beautiful nudibranch shot with shallow depth of field.  These beautiful creatures are commonly known as sea slugs and inhabit oceans world wide.  This one was taken in the Arabian Gulf off UAE.
Ceratosoma tenue Nudibranch with an Emperor Shrimp (Periclimenes imperator) on Its Head. Ambon, Indonesia
Phyllidia varicosa nidubranch under the sea in Koh Tao diving, Thailand
Kunie`s Chromodoris (Chromodoris kuniei)
Underwater photography beauty deep sea, red ascidiacea tunicate Halocynthia papillosa, yellow coral  orange sponge fish reef Sea life.   Scuba diver point of view
Macro underwater photography in Anilao in the Philippines
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 22m depth
flabellina nudibranch underwater macrophography in Ambon indonesia
Underwater photography of tropical reef  species in Papua New Guinea
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