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Nervous System: The Crepidula adunca 's nervous system begins at the neck. There are two main nerves in the head, that give rise to other nerves. The pedal ganglia (supplies nerves to the foot of the snail) gives rise to four other nerves leading to the foot and back to the neck. The visceral loop is composed of three different types of ganglia - the sub-intestinal, the supra-intestinal and the visceral .The visceral loop has a nerve in the mantle of the adunca, which goes to the back of the head when it is contracted. After the foot begins growth, a tentacle begins to form. Finally, when the yolk in egg is absorbed, the embryo flattens and the nervous system finalizes, meaning the adunca is ready to hatch.

Food sources/Nutrition: Because the adunca filter feeds, it uses cilia to bring the small organisms over its gills where it filters out the bacteria from the water using mucus made by the gill cells. Once caught by the mucus, the cilia, known as ciliary action, carries the organisms to the mouth along the dorsal surface. The organisms the adunca filters for are diatoms, dinoflagellates, phytoplankton, bacteria, etc.

Reproduction/Development:

Adunca broods to reproduce, all year. It does not differ between stacking and non stacking females. C. adunca are oviparous, meaning they develop in eggs. In the beginning of mitosis (the first two cell divisions) a polar lobe forms, which takes roughly 42 hours. Once the cells are clear and the head and foot of the mollusc are not fully developed, a shell begins to grow over the embryo. The shell develops color pigments before it fully grown. Adunca hatch when all the yolk has been absorbed.

The longer the female the greater average of gamete abundance. Females typically reproduce the same amount of eggs in a capsule no matter where they are in development.

Adunca reproduce in eggs, where multiple eggs are contained in capsules.

Growth and development in the capsules happens at the same time at the same speed.

It was disproved, with aduncas, that males in solitary and males surrounded by females sex change at different time, instead there is little difference.

Development of the adunca in the eggs takes around four months. When hatched, the gills and radula are fully grown, and no longer develop, and the only signs of larvae growth are the embryonic kidneys and head vesicle grown in the eggs. The shell is not yet fully developed into an adult size, but is bilaterally proportional to the new hatchling.