Color is nice for the reasons mentioned. IMO, color is more important in a fishfinder than in a chartplotter. Color in a fishfinder allows you to tell the size of the fish without regard to the size of the mark it makes. I've often moved around an area of feeding fish to zero in on the bigger one's (orange and red on my ff). It has to do with density that is amost impossible to discern with a monochrome screen.
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