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I recently started a 20 gallon, freshwater tropical aquarium. I'm interested in knowing more bio facts about each of the fish species I have. Especially, do they see in color? My aquarium currently has 1 dalmatian molly, 2 dwarf gourami, 8 neon tetras, and two guppies. If anyone has any informative links on each of these species more specific characteristics, like sight, it would be most appreciated. Thanks.