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Originally Posted by wjfokas I have a c80 display with a dsm 300. Anyone know what tuna Images look like on the fishfinder? thanx  |
Like nightrain said. They will most likely be a blob of red. The DSM "looks' for the swim bladders (stomach). So, the bigger the swim bladder, the bigger the fish. Depth will also play a part in how big they look. At 50 feet the width of the sounder cone is maybe 20 ft wide, so, dont expect to see 30 fish. You might pick up 3 or 4 at a time. Tuna spend most of their time in less than 80 feet of water and they are always moving.