You have to go to the village, and trade in 69 diamonds in order to gain one living fish. If this doesn't work, try swimming around in the biggest ocean you can find, looking near squid.
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Get single player commands then type in spawn silver fish. Make sure it's not on peaceful.
The only way to spawn herobrine in minecraft is to use mods as you cannot spawn him in vanilla minecraft.
No, currently in vanilla Minecraft dinosaurs are not in the game. This means there are no spawn eggs for them.
In creative mode you can spawn a zombie with the egg
Yes, villages spawn in the 1.0.0 release of Minecraft. They were originally added in version 1.8