This app was mentioned in 2 comments, with an average of 2.00 upvotes
Looks like this one here, thanks for the heads up. That looks easy to use and very handy out on the boat.
Next stage on mine is to add some additional details about the species suitability for eating / recipes and replicate some size/bag limit info!
Try this app has all the fishing rules which need to be followed, but also has a basic fish ID guide