What is sand dollars? just a stone? I do not know!!!
Sand dollars (order Clypeasteroida) are flat, round marine animals related to sea urchins, sea stars, and other echinoderms. The most common sand dollar, Echinarachnius parma, is widespread in circumpolar ocean waters of the Northern Hemisphere, from the intertidal zone to considerable depths. A sand dollar has a rigid skeleton known as a test. When sand dollars are living, they have a skin of motile spines covering the test. Movement is accomplished by the coordinated action of the spines. Like sea urchins, sand dollars have five paired rows of pores. In sand dollars they are arranged in a petal-like pattern. These pores are perforations in the endoskeleton through which the podia, used in gas exchange, project from the body.The term sand dollar refers to the round flat shape of the test which is similar to a large coin. By the time the test washes up on the beach, it is usually missing its velvety covering of minute spines and has a somewhat bleached and often slightly greenish appearance due to its exposure to sunlight. Because the bare test is often the only part of the animal which is seen, it is commonly referred to in isolation as a sand dollar.
I hope that explains it Majid, Youtube has a video that is kind of neat to watch as well.Cheers Danny
Wow!! I dont want to know anything more about sand-dollars!! Pretty water and light efects,Danny!! greetings, jenper
Thanx jenper, he wanted to know. Years ago had to get a book to find all this info, but now, the inernet at your fingertips makes it so easy. Glad you enjoyed the water and light effects. Cheers to you, Danny
Well, my little boy wanted to play with him and
ofcourse I put him back to the water!
Thats αστείο Leo. ha, ha! Η τόσο ωραία που συνεχώς έρχονται στο site μου και να δείτε τα πράγματά μου. Χαίρομαι που έχω για ένα φίλο σας στην Ελλάδα. Cheers Danny
I'm glad too, Dnny!!!
You were the first person who visit my gallery and
makes nice comments! I feel very very happy!!!
D A N N Y
Very well done.
Thanks for your information!
Kind regards to you,
You very welcome, Mahdi, come again anytime. Cheers:)) Danny
Another interesting read Danny I learn more and more every day :-)) Marion
Got any of these ? And never to old to learn! Cheers to you, thanks for all the visits and kind words Marion .
Hi Danny so I have seen these before...Great to see them have not them here...Great to see...marion
Thanx Marion, see something here , you don't have there! :)))))
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Photo taken in Greater Vancouver, BC, Canada
Misplaced? Suggest new location