Hyotissa hyotis   (Linnaeus,  1758) (Oyster)
Organism information awaits expert curation
Class: Bivalvia

Image copyrights: TOBA Aquarium

Size: shell size upto 10 .2 cm; Length 17.65-80.00 mm; height 27.32-86.43 mm; thickness 7.59-18.04 mm

Color: Light purple

Shell subequal, moderately thick, hinge without teeth, adductor muscle scar orbicular and nearer to hinge, margin irregular, sculptured with radial ribs on outer surface of outer valve, margin with hyotis spines, extending beyond margin, interior smooth, outer valve slightly inflated, animal without foot or byssus in adult stage, attached by their left valves to substratum.Central adductor muscle with the characteristic central shell scar. The central adductor muscle is much larger and not bounded by Gryphacidaeā€¯.
ridges. Each valves of this shell solid and thick. Shell is sharply ridged forming a series of arches at the edges. The arches of both valves interlock. Inside the shell surface white with brownish purple shell surface. Ligament strait and elongated.

Synonym (s)
Mytilus hyotis Linnaeus, 1758
Pycnodonta hyotis Ranson, 1967
Hyotissa hyotis Stenzel, 1971
Ostrea hyotis Linnaeus, 1758
Ostrea radiata Lamarck, 1819

Common Name (s)
• Giant Honey Comb Oysters
Economic Importance and Threats

Habitat:  Reef Associated, Coastal


• Chagos Archipelago
• Red Sea
• Orissa, Manikpatna INDIA (Record: 1913)
• Orissa, Balaramguri INDIA (Record: 1973)
• Orissa, Konark INDIA
• Orissa, Off Gopalpur INDIA
• Orissa, Ganjam Coast INDIA
• West Bengal, Port Canning INDIA
• Andhra Pradesh, Vishakhapatnam INDIA
• Andaman and Nicobar Islands INDIA
• Tamil Nadu, Mandapam INDIA
• Tamil Nadu, Gulf of Mannar INDIA
• Andaman and Nicobar Islands, Andamans INDIA
• Andaman and Nicobar Islands, Chatham Jetty INDIA
• Andaman and Nicobar Islands, Port Blair (Lat: 11.67) (Long: 92.75) INDIA

Literature Source(s)
  • Rao, NVS; Rao, KVS and Manna, RN (1995) Mollusca Wetland ecosystem series 1: Fauna of Chilka lake ZSI, Calcutta 391-468 Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org
  • Rao, NVS; Rao, KVS and Maitra, S (1991) Marine molluscs State fauna series 1: Fauna of Orissa Zoological Survey of India, Calcutta Part 3 1-175 Available at - NIO, Goa
  • TOBA AQUARIUM Available at - http://www.aquarium.co.jp/index.html
  • Stella, C; Murugan, A and Vijayalakshmi, S (2010) New distributional records of Hyotissa hyotis (Linnaeus, 1758) Family: Gryphaeidae from Mandapam area-south east coast of India World Journal of Fish and Marine Sciences IDOSI Publications 2(1) 42-43 Available at - www.idosi.org/wjfms/wjfms2(1)10/8.pdf
  • Pati, SK; Rao, MV; Balaji, M and Pachu, AV (2011) Community Structure of fouling on a sunken vessel from Visakhapatnam harbour, east coast of India Journal of the Marine Biological Association of India The Marine Biological Association of India 53(1) 14-20 Available at - NIO,Goa
  • Subba Rao, NV and Dey, A (2000) Catalogue of marine molluscs of Andaman and Nicobar Islands Occasional paper no 187 Records of the Zoological Survey of India ZSI 1-323 Available at - NCL, Pune

Page last updated on:2012-07-23

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