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While life on land comprises about 80% of all known species, our oceans contain an abundance and diversity of ordinary and extraordinary life. SAGE members signing up for this class could choose one of these life forms and tell us about the habitat, lifecycle, reproductive cycle, how the species survive in the ocean, etc. From the recently discovered strawberry feathered star (~1.5 million years old) to the ancient horseshoe crabs (445 million years old, a living fossil) the oceans teem with animal life. From the ancient Chinese seaweed (1 billion years old) to the grasses of the shallow waters (100 million years old), the oceans’ plant life is estimated to provide 50% of our atmospheric oxygen. Deep ocean volcanic vents are rich in nutrient chemicals that support life giving rise to life forms that reach huge sizes unlike their shallow water counterparts.

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