FishVille Battle Arena
You can either click on the “Go to Arena” picture on the left or you can click on your tanks and choose the battle tank. I love the trident image on the battle tank! I might have to buy some of the ancient stuff like Poseidon, Medusa, and other stuff to put in my battle tank
When you go the the battle tank you see this:

You can have 5 fish. You still have the feed them like in a regular tank and it still gets algae like a regular tank.
When you click on a fish to train it, you see this:

I love this feature because you can click on “refill health” and use only 1 medicine to refill health all the way to 100! You can keep battling down to 15 so it’s a pretty good deal.
But what I like even more is that you can click to feed your ability foods to a specific fish in the battle tank and not worry that the wrong fish will gobble it up! I wish the supergrow food worked like this 
You can also click on “Train,” and then you see this:

You just click on the fish you want to battle – there are always many to choose from and I just keep battling until I run out of patience for clicking! It will scroll automatically for you to the right as you fight fish but if you want to fight lower fish you have to click backwards every time. That can get a bit annoying – I wish it would do that on its own.
But anyway, when you click on a fish you see the same screen and the word “Go.” When you click on “Go” you see this:

Then you can click on results to see this:

That tells you if you won and if you got any bonuses like extra arena stuff. Then you can click on re-match to fight the same fish again.
I’ve always fought the same fish twice. Then it is KO’d and I get a pop up asking if I want to publish that to my feed. I don’t right now since it doesn’t look like it would benefit my neighbors and I don’t want to spam them too much.
Then I click on “New Match” and start over!
It’s fun, but it is a lot of clicking. It is a great way to get extra coins and XP – more than I get from the treasure chests – and without the lag of visiting other tanks.
Source – Click Here

how can I get arena in my fish ville?tengq..^^
I need to get that Arena Tank NOW!!!!!!!
how come i havent have an arena…………..
How come i don’t have an arena. i need one now!
How come i don’t have an arena. i need one now! pls
i have a arena tank:)
i have the battle tank and when ive battled fish and ko’d them if you wait till they replenish there life there sopposed to give you a bonus when you play them again but the tank goes straight to reload whats with that anyone ???
Will the fishes grow agility or strength or IQ everyday
how do i det the arena tank, please post how
How can I train my more junior ARena fish?