What do we at Sunnieside classify as 'fishing sunglasses'?

Firstly, it needs to be Polarised. Polarised filters cut out ocean glare. Other features that qualify our shades to qualify as good fish catchers are their base curve (how much they wrap around to block abient glare), their ability to stay put on moving heads (rubber nose pads etc) and their capability to have a neck saver attached to the temple tip.