FishVille Battle Arena fish swarm in-game store
Right now, there's five battle fish in all -- two cost coins and the rest require a small investment of a few Sand Dollars.
We assume that these battle fish each have their own unique abilities, though we can't tell exactly what those are at the moment.
FishVille's popularity has been on the decline in recent weeks, so a new Battle Arena feature that lets your fish go head-to-head with friend's fish might be the killer app this aquarium game needs to keep its head above water.
Know if these fish have their own abilities? Leave a comment below!