3. WATER PARAMETERS . Each fish species has specific water requirements, including pH, temperature, and hardness. Before ...

1. Water type: Archerfish are brackish water fish, meaning they need water that is a mix of freshwater and saltwater. 2. Tank size: They require a large tank, to thrive.

A swimmer with an arapaima at an aquarium in Manaus, Native to the Amazon River Basin and large rivers of Guyana, the arapaima can grow to over 10 feet long and weigh more than 400 pounds ...

For years, Heinz Machacek has kept records of big freshwater fish on his website. Here are some of the largest freshwater fish that swim. Print Subscription-$35 for the Best Field & Stream Stories ...

Betta, or Siamese fighting, fish are among "the most popular freshwater aquarium fish in the world," PetMD reports.Native to southeast Asia, this species is known for its range of vibrant hues ...