SAND DOLLAR LÀ CON GÌ
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| echinoids text index | photo lớn 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 svà bars và sandy areas near seagrasses. Often found in groups of large numbers of individuals, half buried in the sand. Sometimes also seen on the Southern shores. Bạn đang xem: Sand dollar là con gì Quý Khách đã xem: Sand dollar là con gì Features: Body diameter 6-8centimet. Seen in various sizes, some may be tiny (about the form size of a 10cent coin). It has no slots in the body toàn thân. While the star-shaped petalloid is not very obvious in living specimens, they are clearly seen in the kiểm tra of a dead sand dollar. The colours of a living sand dollar may range from deep reddish-purple, khổng lồ brownish-purple or beige. Xem thêm: |
     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, and the details of skeleton can be seen more clearly. The skeleton is fragile và will shatter at the slightest pressure. Xem thêm: Tuyển Cộng Tác Viên Viết Báo Mạng, Cộng Tác Viên Báo Chí |
Living s& dollars, not moving under sand.Lazarus Island, Jun 09 |
| What eats s& dollars? Some snails such as the Grey bonnet are believed to feed on svà 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 Clip clip (below) of hermit crabs arguing over a sand dollar. Tiny parasitic snails are sometimes seen on them too. |
