Hummingbird Fish Finder, and Discount Marine Electronics. The methods and tackle used for fishing evolved slowly through the centuries, and not until the late 15th century did sportfishing as it is now known really begin. Of course, the quality of finders has changed over the years, too: years ago, there was a delay between when anglers passed a target and when the lcd displayed it. But, they have always been helpful; for example, on his second cast, he tied into a feisty young largemouth that weighed around two pounds. Who wouldn't want that to happen? Did you know that cages are used to raise fish in lakes, bays, or the open ocean and are constructed of flexible netting suspended from a superstructure floating on the water's surface? This is a version of aquaculture. Also, there are over 9000 species of perch, including tunas, jacks, billfishes, sunfishes, and darters, making it the largest vertebrate order--knowing the fishes and fishing for them are both fun.