collars of moon snails
learn only 3 things about them ...
it feels plasticky and dead, the sand collar is full of
living baby snails!
size of the collar depends on the size of the mother moon
When the baby snails hatch, the sand collar disintegrates.
seen? These frilly edged flat spirals are often seen on
our sandy shores.
What is a sand collar? The sand collar is the egg mass
of a moon snail. A moon snail lays her
eggs at night, combining these with mucus and sand in a gelatinous
sheet which hardens. She lies at the center of the collar as she creates
it, so the hole in centre of the collar gives an indication of the
size of the mother snail. Some sand collars can be surprisingly large!
They are usually the same colour and texture as the surrounding sand.
It's alive! Although the collar
feels hard, plasticky and appears dead, each collar can contain thousands
of living eggs. When the eggs hatch, the collar disintegrates.
Thus, an intact collar has living snails in it! Please don't damage
the sand collars.
Pulau Sekudu, Jul 03
Chek Jawa, Nov 04
collars on Singapore shores
- Tan, K. S.
& L. M. Chou, 2000. A
Guide to the Common Seashells of Singapore. Singapore
Science Centre. 160 pp.