Please Read Each Topic! This Contest is Very Important to me! I'm very sorry that I don't have any visual images! I really don't know how to do many things such as that! I've been busy with many different things over the past few days! I would also like to thank PMC for letting me spread my ideas.

---Topic #1--------------------------

This topic is really important! I had an idea for Deep Sea things. This involves Deep Sea Trenches and Oceanic Dungeons.
This will include whales (Gigantic ones, not puny ones) Whales are able to swallow player alive. If you're trapped in one, you have to wait until blown out through it's blowhole. Whales can be killed but main shell around it (yes, I know whales don't have shells but what I mean is the top of it.) is strong enough to make your sword bounce off the the skin. If you attack underneath the whale, you will hurt it but it will take many hits on account of how large it is.
There are also mermaids, but not any mermaid I would like to meet. These mermaids are killer. If you're far away from it, the mermaid will look beautiful woman/fish, but as you get closer... it looks terrible! It spits it's tongue out at you (a green tongue that when hits you, blocks your vision) and slowly pulls you into it. If on multiplayer, your friends are able to attack the link of the mermaid and you. If not on multiplayer, your wolves are able to defend you.
Then there are the angler fish. Angler fish are those fish with the light on there forehead (You might recognize from Finding Nemo). The light on the angler fish will attract many other fish. The fish will swim to it only to find this demonic creature awaiting it. This angler fish will have sharp teeth and be able to clamp onto you, and when you kill it, it will drop glowstone dust.
With this will come fish. Fish are just tiny mobs floating/swimming around in the water, not much to go into. All these mobs add up to one BIG thing; The Oceanic Dungeon. The dungeon will be a long maze to go through with an unbreakable material around it, Oceanic Bedrock. While going through the dungeon, you will need a Scuba Helmet. This will be used to swim under water without drowning, but this will take its toll, making it to where you can't where a helmet, because it is your helmet. You will need a Glass Pane, 7 Oceanic Ingot (Oceanic Ore will be found in the ocean, mineable with only an iron pick) and 1 oxogen tank. Oxogen tank are made like this:

O|R|O
Ir|R|Ir
Ir|Ir|Ir

O = Oceanic Ingot
R = Redstone
Ir = Iron

Scuba Helmet:

O|Ot|O
O|Gl|O
O|O|O

O = Oceanic Ingot
Ot = Oxogen Tank
Gl = Glass Pane

As you make it through the dungeon, you will trigger traps and run it to killer mobs, like the mermaids, and whales. When swallowed by a whale in the dungeon it will blow you out of the dungeon and will have to restart the dungeon. At the end of the dungeon, you will run into the Dragon Fish. This is a long serpent like fish with a creepy looking head on it. Here is a picture of it's head www.thedivesite.co.za/pages/146/dragonfish This BOSS mob will have a long body like a worm. The worm like creature's tail will be a whole bunch of blackish-blue blocks. These you will need to hit to hurt it. Once one has been hit enough times it will break off. If you try to hit it's head, you wont do any damage, until the long blocks on it's end are all gone. This boss mob will attack with it's head at all times. At first its head will move slowly but then will lunge towards you at random moments. Once enough of the tail (The blocks at the end of it) is gone, it will start to whip its tail at you and you will still have to try to break it. Once killed, it will drop a ton of exp and a dragon fish egg. This egg, you must place in a large body of water. later on when it hatches, you will get a baby dragon fish. This mob will be tamed when it has hatched. Once it is fully grown, you will be able to ride on its back. While riding it, you will bounce in and out of the water at a speeding fast movement.
Near the ocean floor will lie crabs. Crabs will be able to mine downward toward bedrock and be able to climb up the side of blocks in the water. Crabs will drop crab meat

---Topic #2-------------------------

Crows! Crows will be flying around, mostly near your farm. When killed, they will drop seeds. Crows are annoying pests that fly around and annoy you. They will eat your crops and attack you (if you attack them.)
Scarecrows. Crows will be flying around, picking at your crops when you need a scarecrow. Place one, and you now have a crow protected farm. Crows will not come to your farm withing a 8 blocks from the Scarecrow.
Scary-Crows, They are randomly generated Scarecrows that when you look at, aren't moving, but the second you turn your head, IT MOVES! They will start attacking you, but when you look back at them, they'll be frozen once more. When hit, They float up into the sky, and replace one of your real Scarecrows with it. Hope you enjoyed my blog post :) READ BELOW

(I was really tired for half of this, and I was really busy for the next few days, so it was now or never.)