Siput Gonggong (Strombus Canarium) usually release sperm and eggs into the water at night. Conception / fertilasi occurs outside the body or in the pool water. Habits spawn at night and during high tides, had something to do with security instincts, namely to avoid the threat of eggs from predators, and efforts to spread widely through the zygote tidal currents (Hickman, 1992).Spawning (release of egg & sperm) occurs when the conditions of abundant phytoplankton. Eggs are released into the water column and will develop into an embryo fertilized and hatch into larvae trochopore. These larvae swam into the water column using a vibrating hair (velum) or the lining of the pool (pedi-viliger). Membrane pool is growing and serves as a foot (bysus / foot) when the larvae metamorphosed and attached to the substrate.
The success of fertilized eggs to develop into embryos, hatch into larvae, and bermetamofosis into a seedling much influenced by the quality of water, availability of food (micro-algae) in the early stages (larvae).
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