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The surface of the hard palate allows for the pressure needed in eating food, to leave the nasal passage clear. [8] The opening between the lips is termed the oral fissure, and the opening into the throat is called the fauces. [9] At either side of the soft palate are the palatoglossus muscles which also reach into regions of the tongue. These ...
Fertilization is external and larvae are free-swimming like plankton for 14 days or attached to surfaces via byssal thread during metamorphosis, eventually settling on the bottom. [4] They consume plankton filtered from the water passing through their slightly opened shell; the oyster's shell closes when the bivalve is above water during low tide.