Opalescent Nudibranch 2. Oct. 28, 2020. Photograph by Robin Agarwal, via Flickr Creative Commons License. Antiopella fusca. The geographic location of this particular species is along the Pacific coast of North America and Asia (1). Colorful Dirona 1. Blog. Janolus anulatus. Hermissenda opalescens is a species of brightly coloured sea slug or nudibranch, a marine gastropod mollusc in the family Facelinidae. Characteristics. This video is a collection of different nudibranch species, which appear in order as listed. Opalescent Nudibranch Hermissenda crassicornis Typical size: 0.5-3” length ID: Densely packed long, narrow cerata tipped in orange. Distinctive orange stripe on head. Antiopella barbarensis. Hermissenda opalescens. Diamondback Tritonia 1. One of the more obvious nudibranchs along Pacific shores, including Puget Sound, this species can be found crawling slowly in tide pools and on pilings, dock floats, and even open bottom substrates. This species is commonly known as the "opalescent sea slug." Nudibranchs are hermaphroditic but are unable to fertilize themselves. Nudibranch comes from the Latin word ‘nudus’ and the Greek word ‘brankhia,’ meaning ‘naked’ and ‘gills’ respectively. Dirona albolineata. … These rhinophores help them to find food by sensing the chemicals in the water. The Opalescent Nudibranch is common, abundant, and has a life cycle of four months. The opalescent nudibranch is a common aeolid nudibranch species located within niches that range from the rocky intertidal zone to muddy flats (1). Ringed Janolus 11. Opalescent nudibranch are a species of ‘sea slugs’, they have rhinophores that are projections which look like horns on their head. This makes sense because the little flower-type protrusions on the back of the nudibranch are the exposed (naked) gills. Opalescent Nudibranch with a forked oral tentacle. Distribution. There are over 3,000 species of nudibranchs… Body color varies from light blue to white. Opalescent Nudibranchs have been used in laboratory settings for many years, as a model species for neurology, ecology, pharmacology, and toxicology research. [Update March 2018 – There has been a reclassification of this species of nudibranch whereby Hermissenda crassicornis is also being referenced as the “Thick-Horned Nudibranch.Please see my blog at this link for that information.]. Nudibranchs are snails without shells and without the coiled body of their near relatives. White-lined Dirona 2. Posts from the ‘opalescent nudibranch’ category Attack of the Sea Slugs! Other species of nudibranches can live up to a year, and a 6 year life span has been reported when the nudibranch is inside an aquarium. Cockscomb Nudibranch 3. They also tend to lay their eggs in a gelatinous spiral. The best video templates for 7 different situations However, this research may need to be revisited. Dirona picta. White-and-Orange-Tipped Nudibranch 3. This is an Opalescent Nudibranch (Hermissenda crassicornis). Remote health initiatives to help minimize work-from-home stress; Oct. 23, 2020.