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Index Category
Num Date Index Chg. Chg. %
1 2015-03-22 261.90 -7.14 -2.73%
2 2015-03-15 269.05 2.38 0.88%
3 2015-03-08 266.67 0.00 0.00%
4 2015-03-01 266.67 1.59 0.60%
5 2015-02-22 265.08 15.87 5.99%
6 2015-02-15 249.21 11.11 4.46%
7 2015-02-08 238.10 -2.38 -1.00%
8 2015-02-01 240.48 4.76 1.98%
9 2015-01-25 235.71 -3.17 -1.35%
10 2015-01-18 238.89 3.17 1.33%

特徴

産地:It is one of the most widely distributed intertidal shellfishes in South and North China. as a common species, it can be found in coast of Islands around Zhoushan. It lives in the intertidal on the upper rock, rock crevices or under stones and feeds on algae.
特徴:The length of the shell size varies between 15 mm and 45 mm. The shell is heavy and coarse with rough, grained surface with moderate sutures between rounded whorls. The body whorl is swollen and the penultimate whorl somewhat less. The shell shows a rounded keel (a spiral ridge marking a change of slope) and an umbilicus sealed with a callus. The apex is often worn away in adults. The columella has a prominent, blunt tooth. The inner edge of the outer lip shows a number of smaller knobs. The aperture has a nacreous interior. The color of the shell varies from a dark reddish brown to pale brown, with spiraled dashes of cream or pink.