Ethereum Blockchain game Fishbank has finally finished it's Beta phase and has now launched version 1.0. the idea is to catch fish and grow them into bigger batter fish by sending them to attack other players fish. The winning fish from each attack encounter takes a bite from the losing fish, increasing its own weight in the process. I managed to get a free common fish by pestering some friendly soles into signing up using my referral link. I have attacked one other fish so far and won, gaining 2oz. It cost me 3 cents worth of ETH to attack, which i paid for by using my metamask wallet extension on google chrome.
If you would like to join in and get your own fish to fight with or just to have in your aquarium as a screensaver, you can use the catch fish feature which costs 0.03ETH per catch, 
as you can see in the screenshot, you have a chance to catch rare, epic and legendary fish and even a whale! 
You can also buy huge and medium chests containing modifiers which will give extra stats to your fish making them stronger for attacking with. small chests can be gotten by getting people to catch a fish using your referral link - https://play.fishbank.io/go/0x36ed2d75a82e180e0871456b15c239b73b4ee9f4 hint hint, wink wink, nudge nudge :D
You can also sell your fish on the market any time you feel like it! (once you've made it big and strong of course!) any questions like if you need help setting up the https://metamask.io/ wallet feel free to ask in the comments, i'd be happy to help get you fishing! please upvote if you found this helpful and resteem so your followers can get in on the action too! thanks for reading, follow me, @justdik for future awesomeness and cos i follow back everyone! :) happy fishing!
here's my lil common chum chillin in my aquarium!