Better gameplay in oceans

Even in last version of minecraft oceans are pretty big and empty. There is very few things you can do and there is only temples we could say quite a fun but very small amount of players goes there. So I thinked that if there was sharks it would be so much fun. Because it is easy to fight with drowned zombies and easy to run. But if there was sharks swimming in big oceans they could attack out boats and cause some problem. Also, when we kill them we could get shark theets and use them for materials. And if the sharks are rare it players would go for find them and if a player just exploring with a boat and a shark just starts to swim on them it would be so much better than just going on a boat for long times and finding nothing. So, I believe that sharks would make minecraft oceans more fun.