"Expect more underwater content in Minecraft." -Notch
Well, I've already fleshed-out my thoughts for underwater conundrums, but let's hear yours!
Anything and everything you hope to encounter underwater!
Come to think of it, it does give me an idea or two myself...
And, some ideas which have had much mention before which I am in support of.
It'd be useful, and novel, to have a trident as a weapon.
Sharks! Getting hurt in water could "attract" them in some way as well.
Deeper waters; I'm talking down to the bedrock.
Underwater volcanoes spewing out magma, which could act as lava that water can't cool? Then you could have intensely hazardous areas to explore. [Or maybe I just miss my underwater lava-mining days from the early survival-mode :tongue.gif:]
A spear gun would also be pretty awesome, but you'll be shark bait since they only shoot 1 spear a shot.
Papyrus-shoots as underwater-ninja-breathers?
And consider adding this creature from the old movie "Fire and Ice  .
Rollback Post to RevisionRollBack
Professional Underwater Lava-miner.
Also a massive mushroom mongler.
For anything underwater to be really worthwhile to do we're going to need an easier way to see under water, a way to move faster, as well as some sort of extension to how long we can breathe. 10 seconds under water moving in slow motion and taking three times as long to break anything, all while in the dark or using pumpkin lanterns that barely give any light is not convenient at all.