Phyllidiella zeylanica   (Kelaart,  1859) (Sea Slug)
Organism information awaits expert curation
Class: Gastropoda

Image copyrights: Giovanni Marola

Size: Max length 6.0 cm TL (male)

Color: Three black concentric bands running round the notum and an interrupted median dark band. The median band and the first concentric dark band is prominent. The concentric band is incomplete posteriorly leaving a small gap. The other two more marginally situated bands are very narrow and inconspicuous. In between the dark concentric bands are prominently elevated greenish yellow longitudinal ridges bearing tubercles of varying sizes. These ridges run across in front of the rhinophore and behind the anal region. Mantle tubercular, salmon-colored; three continuous black lines run round the whole length; the internal one broader, taking within its circuit the dorsal tentacles and anal orifice; two other lines run parallel to this all round the mantle, the outer one narrowest. Dorsal tentacle large, conical, pointed circularly laminated at the upper half, which is of a black color.

The dorsal surface of the mantle has five longitudinal rows of tubercles which are arranged in a semicircular fashion along the anterior and posterior margins except the median one. Irregular tubercles are arranged in a group of two or three. Median ridge forms a canal like structure at the centre filled with black lines. These lines, excepting the median one are all along the posterior and anterior margins in a semicircular fashion; possess rough ridges.

Synonym (s)
Phyllidia catena Pruvot-Fol, 1956
Phyllidia empelia Yonow, 1984
Phyllidia seriata Pruvot-Fol, 1957
Phyllidia zeylanica Kelaart, 1859

Common Name (s)
Economic Importance and Threats

Habitat:  Reef Associated, Demersal


• Karnataka, Netrani Island (Lat: 14.01) (Long: 74.33) INDIA (Record: 08/05/2006) (Depth: 12 mts)
• Andaman and Nicobar Islands, Andaman Island INDIA
• Andaman and Nicobar Islands, Pongi Balu INDIA
• Gujarat, Gulf of Kachchh INDIA
• Lakshadweep, Kavaratti INDIA
• Lakshadweep INDIA
• Andaman and Nicobar Islands INDIA
• Gujarat, Mithapur Reef (Lat: 22.41) (Long: 68.98) INDIA (Record: 03/04/2010) (Depth: 1.5 mts)

Literature Source(s)
  • Zacharia, PU; Krishnakumar, PK; Dineshbabu, AP; Vijayakumaran, K; Rohit, P; Thomas, S; Sasikumar, G; Kaladharan, P; Durgekar, RN and Mohamed, KS (2008) Species assemblage in the coral reef ecosystem of Netrani Island off Karnataka along the southwest coast of India Journal of the Marine Biological Association of India The Marine Biological Association of India, Cochin, India 50(1) 87-97 Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Opisthobranchs from the Mediterranean Sea and elsewhere Available at -
  • Sealifebase Available at -
  • Ramakrishna; Sreeraj, CR; Raghunathan, C; Sivaperuman, C; Yogesh Kumar, JS; Raghuraman, R; Immanuel, T and Rajan, PT (2010) Guide to Opisthobranchs of Andaman and Nicobar Islands ZSI, Kolkata 187 pp Available at - NIO, Goa
  • (2011) Animal discoveries 2010 Zoological Survey of India 1-107 Available at -
  • Matwal, M and Joshi, D (2011) Record of Phyllidiella zeylanica (Mollusca: Gastropoda: Opisthobranchia) after 42 years from Gujarat, India Journal of Threatened Taxa Wildlife Information Liaison Development Society 3(7) 1951–1954 Available at -

Page last updated on:2011-09-15

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