00:02Work on the first few days is focused on life in the open sea.
00:06It centers on plankton,
00:08the billions of minute organisms at the start of the food chain
00:12which live in the upper reaches of the ocean.
00:24Every cubic meter of seawater contains millions of these organisms,
00:30plants like diatoms and animals ranging from protozoans to large jellyfish.
00:43Also present are eggs and larvae,
00:46which will later develop into corals, sponges, crustaceans or fish.
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