True, The first oceans were formed around 3.8 billion years ago., The jellyfish usually live for several weks., Sperm whales can dive to 2000 meters., Jelly fish were here 500 millions of years ago., The anglerfish is the ugliest animal in the world., The biggest coral reef is in Australia., Corals can be different colours., False, The oceans never change., The deepest part of the ocean is Mariana trench and it is 2000 meters deep., Sperm whales' brain is not big., Jelly fish have hearts and brains., No submarines could reach the bottom of Mariana trench., Corals are plants, not animals., Coral can live in cold eater with no sunlight. .

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