Sand collar

As sand collar or English. Sand collars called zoology Built artful, fine sand existing egg masses ( spawn ), which are built by different marine worm species such as the limpet and the moon snails. The tiny eggs are glued together to form a flat belt with the help of a water resistant jelly and literally wallpapered with sand. After the layers are to be two to seven layers adhered to each other, erect and curled up, until they form a simple to complex, open towards the top cone. Then hardens the spawning belt, slightly depressed in the seabed, and thus protects the eggs. Depending on the type hatch from the capsules pelagic up to several weeks until the metamorphosis of living planktonic veliger larvae (eg Shiny moon snail ) or finished small snails ( eg banded - moon snail ).