1387-734 - Ceratosoma nudibranch, Anilao, Philippines.

1387-730 - Glossodoris nudibranch, Anilao, Philippines.

1387-639 - A Doriprismatica nudibranch face on portrait, Anilao, Philippines.

1387-565 - A beautiful nudibranch, Chromodoris coi, crawls across the seafloor in Komodo National Park, Indonesia.

1387-444 - A vibrant nudibranch, Phyllidia sp., feeds on sponges on a coral reef in the remote, tropical islands of Raja Ampat, Indonesia.

1387-443 - A pair of vibrant nudibranchs, Nembrotha kubaryana, mate on a coral reef in the remote, tropical islands of Raja Ampat, Indonesia.

1387-408 - A colorful nudibranch, Phyllidia varicosa, crawls on a black sand seafloor in Alor, Indonesia.

1387-367 - A beautiful nudibranch (Halgerda batangas) crawls across the black sand seafloor in Lembeh Strait, Indonesia.

1387-262 - A colorful nudibranch (Nembrotha kubaryana) crawls slowly across a reef near the island of Sulawesi, Indonesia. This beautiful, tropical region is home to an incredible variety of marine life.

1387-259 - A pair of Ceylon nudibranchs (Gymnodoris ceylonica) mate on a sandy slope in Komodo National Park, Indonesia. This tropical region in Indonesia is known for its spectacular coral reefs and high marine biodiversity.

1387-242 - A beautiful nudibranch (Hypselodoris bullockii) crawls slowly across a reef in Indonesia. This tropical region, within the Coral Triangle, is home to an incredible variety of marine life.

1387-189 - A beautiful nudibranch (Halgerda batangas) crawls on the sandy seafloor of Lembeh Strait, Indonesia. Lembeh Strait is known for its diverse array of bizarre marine organisms.

1387-89 - A pajama nudibranch (Chromodoris quadricolor) attempts to climb up the side of a sea cucumber, Philippines, Southeast Asia, Asia

1387-59 - A gathering of robe hem hypselodoris nudibranchs (Hypselodoris apolegma), Komodo, Indonesia, Southeast Asia, Asia

860-291977 - Detail of a Krohn's Doris (Felimida krohnien) moving on rock, Ile d'Oleron, France

759-13798 - Dorid Nudibranch, Chromodoris kuniei, Tufi, Solomon Sea, Papua New Guinea

759-13796 - Dorid Nudibranch, Chromodoris kuniei, Tufi, Solomon Sea, Papua New Guinea

759-13797 - Dorid Nudibranch, Chromodoris kuniei, Tufi, Solomon Sea, Papua New Guinea

759-12751 - Spanish Dancer Nudibranch, Hexabranchus sanguineus, Raja Ampat, West Papua, Indonesia

759-12750 - Spanish Dancer Nudibranch, Hexabranchus sanguineus, Raja Ampat, West Papua, Indonesia

759-12511 - Black and white Nudibranch, Jorunna funebris, Sanganeb, Red Sea, Sudan

759-12407 - Pink Dorid Nudibranch, Hypselodoris bullockii, Bali, Indonesia

759-12396 - White Dorid Nudibranch, Hypselodoris sp., Bali, Indonesia

759-12397 - Pink Dorid Nudibranch, Hypselodoris bullockii, Bali, Indonesia

759-12395 - Yellow Dorid Nudibranch, Gymnodoris rubropapulosa, Bali, Indonesia

759-12345 - Dorid Nudibranch, Tambja sp., Komodo National Park, Indonesia

759-12321 - Dorid Nudibranch, Chromodoris magnifa, Komodo National Park, Indonesia

759-12310 - Dorid Nudibranch, Nembrotha rutilans, Komodo National Park, Indonesia

759-12239 - Two Dorid Nudibranch, Nembrotha lineolata, Komodo National Park, Indonesia

759-12166 - Yellow Nudibranch, Notodoris minor, Florida Islands, Solomon Islands

759-11994 - Yellow Nudibranch on Blue Starfish, Notodoris minor, Florida Islands, Solomon Islands

759-11995 - Yellow Nudibranch on Blue Starfish, Notodoris minor, Florida Islands, Solomon Islands

759-11984 - White Dorid Nudibranch, Chromodoris lochi, Florida Islands, Solomon Islands

759-11983 - Green Neon Slug, Nembrotha kubaryana, Florida Islands, Solomon Islands

759-11982 - Green Neon Slug, Nembrotha kubaryana, Florida Islands, Solomon Islands

759-11615 - Dorid Nudibranch, Mexichromis multituberculata, Ambon, Moluccas, Indonesia

759-11508 - Warty Nurdibranch, Phylidiella pustulosa, Kai Islands, Moluccas, Indonesia

759-12632 - Neon Slug Nudibranch, Thecacera picta, Ambon, Moluccas, Indonesia

759-12633 - Neon Slug Nudibranch, Nembrotha purpureolineolata, Ambon, Moluccas, Indonesia

759-11358 - Neon Sea Slug, Thecacera picta, Triton Bay, West Papua, Indonesia

860-289873 - Nudibranch ( picta azorica). This subspecies is known only from the Azores. Santa Maria Island, Azores, Portugal, Atlantic Ocean

1350-2548 - Dorid nudibranch, Glossodoris averni, La Laguna, Puerto Galera, Mindoro, Philippines.

1350-2535 - Nudibranch, Jorunna funebris, feeding on blue sponge, Haliclona sp., Monkey beach, Puerto Galera, Mindoro, Philippines.

860-288897 - Giant Doris (Felimare picta), off Calella de Palafrugell, Costa Brava, Spain

1116-39939 - An Imperial commensal shrimp (Periclimenes imperator), photographed at night on the Spanish dancer nudibranch (Hexabranchus sanguineus), that it calls home, Philippines

973-32 - Dorid Nudibranch (Chromodoris willani). Borneo, Malaysia (RR)

973-49 - Dorid Seaslug(Chromodoris magnifica). Borneo, Malaysia (RR)

973-33 - Dorid Nudibranch (Chromodoris bullocki). Borneo, Malaysia (A4 only).

973-48 - Dorid Seaslug(Chromodoris bullocki). Borneo, Malaysia (RR)

973-35 - Dorid Seaslug (Chromodoris bullocki). Borneo, Malaysia (RR)

920-1357 - Dorid nudibranch (Glossodoris averni), La Laguna, Puerto Galera, Mindoro, Philippines, Southeast Asia, Asia

920-1359 - Dorid nudibranch (Chromodoris kuniei), La Laguna, Puerto Galera, Mindoro, Philippines, Southeast Asia, Asia

920-2473 - Dorid nudibranch (Chromodoris kuniei), La Laguna, Puerto Galera, Mindoro, Philippines, Southeast Asia, Asia

920-1372 - Dorid nudibranches (Chromodoris spp.), Lapus Lapus Island marine park, Malapascua, Cebu, Philippines, Southeast Asia, Asia

759-6192 - Mediterranean Dorid Slug, Hypselodoris elegans, Tamariu, Costa Brava, Mediterranean Sea, Spain