Cellana genus of sea snails or limpets , marine gastropod molluscs in the family Nacellidae, the true limpets .
This genus occurs in the temperate and tropical Indo-Pacific oceans, Hawaii (where they are known as ‘opihi and considered a delicacy) and around Australia and New Zealand . Species are also found around the coasts of Japan , the Red Sea , Mauritius , Madagascar , South Africa and the sub-Antartarctic Islands. One species, Cellana radiata , is cosmopolitan.
These sea snails feed by grazing on green macroalgae growing on rocky substrate in the intertidal zone . Some of these limpets can live up to 7 years, however most do not get older than 2–3 years. They reproduce by broadcasting their spawn in large, yolky eggs in great numbers (between 20,000 for C. flava and C. denticulata to 230,000 for C. ornata ).
Species within the genus Cellana include:
Cellana analogia T. Iredale , 1940 Cellana ardosiaea (Hombron & Jacquinot, 1841) † Cellana carpenteriana Skwarko, 1966 Cellana conciliata T. Iredale , 1940 - Rainbow limpet† Cellana cophina Powell, 1973 Cellana craticulata Suter , 1905† Cellana cudmorei Chapman & Gabriel, 1923 Cellana cylindrica (Gmelin , 1791) † Cellana deformis (K. Martin, 1883) Cellana denticulata Martyn , 1784Cellana dira (Reeve , 1855) Cellana eucosmia Pilsbry , 1891C. grata )Cellana exarata - Hawaiian blackfoot opihi Cellana flava Hutton, 1873 Cellana granostriata (Reeve , 1855) Cellana grata Gould , 1859Cellana grata stearnsi H. A. Pilsbry , 1891 † Cellana hentyi Chapman & Gabriel, 1923 Cellana howensis T. Iredale, 1940 Indo-Pacific Cellana karachiensis Winckworth, 1930 Red Sea Cellana livescens (Reeve, 1855) Cellana mazatlandica Sowerby, 1839 Cellana melanostoma Pilsbry, 1891 Cellana nigrolineata Reeve, 1854 Cellana oliveri Powell, 1955 Cellana ornata Dillwyn, 1817 Cellana pricei A. W. B. Powell, 1973 Cellana radians (Gmelin , 1791) Cellana radiata I. von Born, 1778 Cellana radiata capensis (Gmelin, 1791) Cellana radiata cylindrica Gmelin, 1791 Cellana radiata enneagona (L. A. Reeve, 1854) Cellana radiata orientalis (H. A. Pilsbry, 1891) Cellana radiata radiata (Born, 1778) Cellana rota (Gmelin, 1791) Cellana sandwicensis (Pease, 1861) Cellana solida Blainville , 1825Cellana stellifera Gmelin, 1791 Cellana strigilis Powell, 1955 Cellana strigilis strigilis Hombron & Jacquinot, 1841 Cellana strigilis bollonsi Powell, 1955 Cellana strigilis chathamensis (Pilsbry, 1891) Cellana strigilis flemingi Powell, 1955 Cellana strigilis oliveri Powell, 1955 Cellana strigilis redimiculum (Reeve, 1854) Cellana taberna Powell, 1973 Cellana taitensis . F. Röding , 1798 Cellana talcosa Gould , 1846Cellana testudinaria Linnaeus , 1758† Cellana thomsoni Powell & Bartrum, 1929 Cellana toreuma Reeve, 1855 Cellana tramoserica Holten, 1802 Cellana turbator T. Iredale, 1940 Cellana vitiensis A. W. B. Powell, 1973 The sources given below, also mention the following species :
Cellana ampla Cellana ardosioea Hombron & Jacquinot, 1841 Cellana argentata Sowerby, 1839 Cellana enneagona L. A. Reeve, 1854 Cellana nigrisquamata L. A. Reeve, 1854 Cellana profunda mauritiana H. A. Pilsbry, 1891 Species brought into synonymy Cellana capensis (Gmelin, 1791) : synonym of Cellana radiata (Born, 1778) Cellana cernica (H. Adams , 1869) : synonym of Cellana livescens (Reeve, 1855) Cellana eudora Iredale, 1940 : synonym of Cellana radiata orientalis (Pilsbry, 1891) Cellana garconi (Deshayes, 1863) : synonym of Cellana livescens (Reeve, 1855) Cellana hedleyi W. R. B. Oliver, 1915 : synonym of Cellana craticulata (Suter, 1905) Cellana laticostata (Blainville, 1825) : synonym of Scutellastra laticostata (Blainville, 1825) Cellana sagittata A. A. Gould, 1846 : synonym of Cellana vitiensis Powell, 1973 Cellana scopulina W. R. B. Oliver, 1926 : synonym of Cellana craticulata (Suter, 1905) Cellana vulcanicus W. R. B. Oliver, 1915 : synonym of Cellana craticulata (Suter, 1905) 
