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Predators of the sand dollar are the fish species cod, flounder, sheepshead and haddock. These fish will prey on sand dollars even through their tough exterior. [9] Sand dollars have spines on their bodies that help them to move around the ocean floor. When a sand dollar dies, it loses the spines and becomes smooth as the exoskeleton is then ...
The tests (shells) of these sand dollars are round, flat and disc-like, typically measuring 3 inches (7.6 cm) in diameter. The growth rate for this animal is between 3.5 to 6 mm/yr in the latter 5 years of their lifespan, and the lifespan is typically around 8 years. [2]
Echinodiscus bisperforatus is a species of sand dollar described by Nathanael Gottfried Leske in 1778. [1] The species is found throughout the Indo-Pacific in the Red Sea and off the coasts of south and east South Africa, Thailand, Malayan Archipelago, and New Caledonia at depths up to 20 meters. It grows to lengths of 11.8 centimeters. [2] [3]
Clypeasteridae is a family of sea urchins in the order Clypeasteroida.This family was first scientifically described in 1835 by the Swiss-American biologist Louis Agassiz.. The clypeasteridae also known as the sand dollar, are round and semi-flat organisms with spines lining the underside of the body and elongated genital papillae aiding its survival and reproduction.
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The term seashell is also applied loosely to mollusk shells that are not of marine origin, for example by people walking the shores of lakes and rivers using the term for the freshwater mollusk shells they encounter. Seashells purchased from tourist shops or dealers may include various freshwater and terrestrial shells as well.
“The Sand Castle” is made up of intentionally simple elements: an abandoned island, a creaky old lighthouse, an intermittently working radio. And at its center is a family of four: a doting ...
The Moving Sands, also known as the Flowing Sands (Liúshā (流沙), "flowing-sand", or "quicksand"), is an important feature in the mythological geography of Chinese literature, including novels and poetry over a course of over two millennia from the Warring States to early Han dynasty era poetry of the Chuci onward to the present.