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An undescribed flatworm, Thysanozoon sp., swims near the coral-covered seafloor of Raja Ampat, Indonesia. This equatorial region is home to an extraordinary amount of marine biodiversity.
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. This specimen was encountered in the Lembeh Strait, Indonesia. 1°27'39.69 N 125°14'33.342 E at 17m depth
Flabellina affinis, underwater shot.
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)
Sea Slug, Dorid Nudibranch, Crested Nembrotha, Nembrotha cristata, Coral Reef, Lembeh, North Sulawesi, Indonesia, Asia
A supermacro photo of Anna's Chromodoris, or Chromodoris annae at a tropical coral reef in the Philippines.
BLACKSPOT NUDIBRANCH
Underwater photography of tropical reef  species in Papua New Guinea
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.Nudibranchs 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.In 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.The 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.
A tiny nudibranch nicknamed the “sea bunny,” Jorunna parva, crawls delicately across the reef bed in Thai coastal waters. Its rabbit-like appearance, with ear-like rhinophores and a soft furry texture, makes it a favorite among macro underwater photographers. Captured in vivid detail in the warm tropical sea, showcasing rare and adorable marine life.
Closeup of a  brightly colored Nudibranch crawling  on corals
Yellow nudibranch eggs.  Close up Abstract.  Exploring and enjoying Beautiful Sea Life macro .  Underwater scene at clear mediterranean sea.  Scuba diver point of view. Greece Europe. Underwater photography. Photographed with Nikonos V, 35mm lens Macro 1:1 (real size 24x36mm) on Fujichrome Velvia 50
Sea Slug, Bullock's Hypselodoris, Hypselodoris bullocki, Dorid Nudibranch, Bunaken National Marine Park, Bunaken, North Sulawesi, Indonesia, Asia
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
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.
A juvenile frogfish resting on the seafloor in a shallow underwater environment.Its unusual body shape and textured skin highlight the diversity of marine life found in coastal reef ecosystems.This image is suitable for educational materials, marine biology content, biodiversity topics, and nature-related publications.
Gabriela's Tambja, Dorid Nudibranch
A nudibranch, Nembrotha lineolata, at a beautiful coral reef teeming with life. Picture from Puerto Galera, Philippines.
Close-up of a Ceratosoma tenue Nudibranch. Ambon, Indonesia
Sea life Nudibranch Underwater beauty Scuba diver point of view
A nudibranch of the family Notodoris Serenae sitting on a coral reef in Bali, Indonesia
The dorid nudibranch Goniobranchus coi (former Chromodoris coi) occurs in the tropical Western Pacific. This specimen might be 4cm long. Kri Island, Raja Ampat, West Papua, Indonesia, 0°33'18\
Two vibrant Goniobranchus coi nudibranchs rest near a sea star on a coral reef. This underwater macro shot captures the striking colors and textures of marine life, showcasing the rich biodiversity of tropical reef ecosystems. Perfect for themes related to marine biology, ocean ecology, and underwater photography
Phyllidia varicosa nidubranch under the sea in Koh Tao diving, Thailand
Nudibranch on a coral Reef, Musandam, Oman
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
A super macro photo of a Rudman's Phyllidiella nudibranch sitting on a piece of coral. Picture from Puerto Galera, Philippines
Bullock's Hypselodoris Hypselodoris bullockii occurs widespread in the tropical Indo-West Pacifix, max. length 7cm. This Sea Slug or dorid nudibranch has been mistaken for at least eight other species. This specimen was encountered in the Lembeh Strait, Indonesia1°27'38.166 N 125°13'34.284 E at 18m depth
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