Look Alikes
provided by Invertebrates of the Salish Sea
How to Distinguish from Similar Species: Doris montereyensis is more yellow and has dark spots on the dorsum. Aldisa tara is usually smaller than 3 cm long, has a flat rather than an arched dorsum, and has a ring of tubercles around the pits from which the rhinophores emerge.
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Habitat
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More common in subtidal rocky areas. Rare in low intertidal zones.
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Distribution
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Geographical Range: Kenai Peninsula, Alaska to San Diego, CA
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Habitat
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Depth Range: Low intertidal, to subtidal 25 m.
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Comprehensive Description
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Body usually 60 to 90mm long, but can be up to 200 mm. Usually pure white, sometimes is slight cadmium yellow. It has low tubercles. Rhinophores are large, retractile, have 25 leaves, and are conical. Has seven gills. Dorsum is arched
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Comprehensive Description
provided by Invertebrates of the Salish Sea
Biology/Natural History: Feeds on several sponges, among them Halichondria panicea and representatives of the genera Myxilla, Mycale, Stylissa, Tedania, Craniella, and Syringella. Eaten by the rose star Crossaster papposus. Eggs are deposited in areas of high current. Eggs are laid in large masses of thin, wide ribbons. Egg ribbons may be found year-round in Washington state. The ribbons form oval spirals with a fluted edge and are attached by one edge to the substrate. Each capsule in the ribbon usually contains 8 to 12 eggs. Named after biologist Nils Hjalmar Odhner. Recent evidence also shows that this nudibranch feeds on deep-living glass sponges such as Aphrocallistes vastus and Heterochone calyx, as well as the demosponge Desmacella austini that encrusts them. These are all found in deep sponge reefs off the west coast of Canada. This is the first documented instance of animals feeding on glass sponges outside of Antarctic waters.
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Doris odhneri
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Doris odhneri is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk in the family Dorididae.[2][3] It is known by many common names, such as: giant white nudibranch, giant white dorid, and white-knight nudibranch. It is also often referred to as Odhner's dorid to honor Nils Hjalmar Odhner, the scientist it is named after.[4]
Description
Doris odhneri is the largest nudibranch on the California coast, measuring up to 20 cm. It is completely white in color with no markings, however anomalies with a yellowish hue have been described in the Puget Sound region. A conspicuous characteristic of this nudibranch is its gill. It is composed of seven fluffy plumes and its rhinophores have 20 to 24 lamellae.[4][5][6]
Life habits
Their diet consists of sponges, mostly Halichondria.[7] It is rarely found in the intertidal, and is more likely to be found in the subtidal to 75 ft. Like most nudibranchs, Doris odhneri is hermaphroditic and mates with the right sides of the body together. Elegant ribbon-like egg masses are laid and attached to hard substrates.[8]
Distribution
Doris odheri can be found from Kenai Peninsula, Alaska to Point Loma, California.[4]
References
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^ MacFarland, F.M. (1966) Studies of opisthobranchiate mollusks of the Pacific coast of North America. Memoirs of the California Academy of Sciences, 6: 1-546.
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^ Rosenberg, G. (2015). Doris odhneri MacFarland, 1966. In: MolluscaBase (2015). Accessed through: World Register of Marine Species on 2016-12-04.
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^ Behrens D. W. (2004). "Pacific Coast Nudibranchs, Supplement 2. New species to the Pacific Coast and new information on the oldies". Proceedings of the California Academy of Sciences 55: 11-54.
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^ a b c Behrens D. W. (1991). Pacific Coast Nudibranchs.
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^ Rudman, W.B., 2000 (October 12) Archidoris odhneri (MacFarland, 1966). [In] Sea Slug Forum. Australian Museum, Sydney.
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^ Behrens, D. W. (2006) Doris odhneri In: Miller, M. The Slug Site
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^ Kozloff E. (1993). Seashore life of the Northern Pacific Coast. University Press.
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^ Hildering, J. & Miller, G., 2007 (Jul 27) Doris odhneri eggs?. [Message in] Sea Slug Forum. Australian Museum, Sydney.
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Doris odhneri: Brief Summary
provided by wikipedia EN
Doris odhneri is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk in the family Dorididae. It is known by many common names, such as: giant white nudibranch, giant white dorid, and white-knight nudibranch. It is also often referred to as Odhner's dorid to honor Nils Hjalmar Odhner, the scientist it is named after.
Doris odhneri
Doris odhneri
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Doris odhneri 
Doris odhneri
