FishPhone iPhone app gives you a lot of info about your fish.

Most the times, fish lovers or novice who want to know more about the fish they are looking at at the fish market or on their plates at the restaurant, there is not much to go by with. It does not have to be that way if you own an iPhone and are willing to download a free app called FishPhone from the iTunes store.
"With the FishPhone iPhone app from the Blue Ocean Institute, you have a wealth of information about the type of fish you're looking at and whether it's been sustainably farmed or caught right on your iPhone," according to AppScout.
The fishes in the app have an icon appear next to them indicating the level of sustainability or environmental friendliness in which they were caught or farmed.
Each fish in the seafood guide has an icon next to it that represents its sustainability or environmental friendliness.
Non iPhone or iPod owners who still want to know more about a fish they are interested in, can still get the information via text message from the Blue Ocean Institute by asking.

For more, see AppScout.com