AppearanceLiving specimens reaching 50 mm in length (Gosliner et al., 2008, 2015). Body broadest anteriorly, tapering to posterior end of foot extending well beyond notum. Rhinophores elongate with about 20–25 complete or incomplete transverse lamellae. Well-developed convoluted caruncle present between rhinophores (Figure 6a–c). Two eyes appearing as small black dots, appearing by transparency just behind rhinophores. Large, swollen cardiac area located near middle of notum. Pair of short and digitiform oral tentacles extending from either side of head. Cerata elongate, globose centrally, ending with acutely pointed apex. Most of cerata are covered with many prominent tubercles near middle. Cerata arranged in 8–12 closely-packed longitudinal rows with 4–5 cerata per row on each side which are irregularly arranged. Digestive gland inserting into most cerata at base, splitting into numerous branches, and terminating at globose portion of cerata. Anteriormost cerata often lacking extensions of digestive gland. Anus located mid-dorsally near posterior end of notum on elevated papilla. Anal glands absent. Gonopore located on right side in middle of body.
DistributionIndian and western Pacific oceans (Gosliner et al., 2015). This species has been found in the Philippines (Gosliner et al., 2008; present study), Papua New Guinea (Coleman, 2008), Japan, Solomon Islands, Red Sea, Indonesia, Vanuatu (Gosliner et al., 2008), Indonesia (Debelius & Kuiter, 2007) and perhaps Australia (www. nudipixel.net).
Some text fragments are auto parsed from Wikipedia.https://en.seaslug.world/species/janolus_flavoanulatus
Gosliner, Terrence M., David W. Behrens & Ángel Valdés. 2008. Indo-Pacific Nudibranchs and Sea Slugs. Sea Challengers Natural History Books.
Köhler, E. (2019), published 9 May 2019, Janolus flavoanulatus Pola & Gosliner, 2019
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Cladobranchia/Janolus_flavoanulatus.htm