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Welcome to The Aquarium Wiki The free encyclopedia of all things aquatic. Currently Serving 2,693 articles with 98,066 edits. Search: <inputbox> type=search2 buttonlabel=Go width=30 break=no id=MP </inputbox> Browse Saltwater Fish Tangs | Gobies/Blennies | Angelfish Freshwater Fish Bettas | Tetras | Cichlids | Catfish Plants All Pages Saltwater Invertebrates Anemones | Shrimp | Crabs | Snails | Starfish Freshwater Invertebrates Crayfish | Crabs | Shrimp | Snails Brackish water Fish | Invertebrates | Plants All Categories Featured Article Guppy The infamous Guppy, or Poecilia reticulata. Often sold as the beginners fish, it's known for its ability to multiply in number at a rapid rate. Suitable for tanks 38 Litres (10 US G.) or more, males usually stay under 5.1cm (2") in length, while females can be anything from 5.1cm (2") to 8.9cm (3.5"). As these fish are livebearers, it's best to keep them in the ratio of 1 male per 2-3 females to avoid the males harassing females to the point of exhaustion. For more details please click on the Title name.