The sea is also very dangerous in some place.The high mountain in the world is almost 9 kilometers high.If that mountain was p____ into the sea at that place,there would be still 2 kilometers of water around it.In most part of the sea ,there are p___ of fishes and plants.Some live near the top of the sea.Others live deep down.There are a lot of small living things.Lots of fish live by e___ them.有点长,不过空不多,麻烦看一下,我会的已经填好了.好的我会加悬赏,