Sand Dollar Là Con Gì

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echinoids text index | pholớn index
Phylum Echinodermata > Class Echinodea > Order Clypeasteroida
Cake s& dollar Arachnoides placenta Family Clypeasteridae updated Mar 20trăng tròn Where seen? This rather featureless disk-shaped animal is commonly seen on some of our Northern shores, on s& bars and sandy areas near seagrasses. Often found in groups of large numbers of individuals, half buried in the s&. Sometimes also seen on the Southern shores.

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quý khách hàng sẽ xem: S& dollar là con gì Features: Body diameter 6-8cm. Seen in various sizes, some may be tiny (about the kích cỡ of a 10cent coin). It has no slots in the body. While the star-shaped petalloid is not very obvious in living specimens, they are clearly seen in the chạy thử of a dead sand dollar. The colours of a living sand dollar may range from deep reddish-purple, khổng lồ brownish-purple or beige.

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Mouth on the underside.
Dead or alive? Svà dollars may appear dead, but they are very much alive sầu. A living svà dollar is covered with fine spines & appears velvety. The skeleton (test) of a dead one is smooth, without any spines, và the details of skeleton can be seen more clearly. The skeleton is fragile & will shatter at the slighkiểm tra pressure.

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Living s& dollars, not moving under sand.Lazarus Island, Jun 09
What eats s& dollars? Some snails such as the Grey bonnet are believed khổng lồ feed on s& dollars. A Knobbly sea star was seen with its stomach stuchồng to lớn a svà dollar. A Haddon"s carpet anemone was also seen in the process of engulfing one. Kok Sheng also shared a video clip clip (below) of hermit crabs arguing over a s& dollar. Tiny parasitic snails are sometimes seen on them too.
Chuim mục: Kiến Thức