green ormer, haliotis tuberculata

abalones aperture atlantic beach bottom canaria coast coastal curving decline delicacy earshaped flattened found gastropod gran green haliotidae haliotis holes inner iridescent layer margin marine mediterranean mollusc motherofpearl mottled nacre northeast ormer outer oval overfished overfishing population respiratory row sea selenizone shell shore snail snails species spiral surface the thick tuberculata