The term "Flagtail Barracuda" is commonly associated with the Flagtail Prochilodus (Semaprochilodus taeniurus), a freshwater fish species. Here are some details:
 
Specifications:
Average Size: 12-18 inches
Lifespan: 8-10 years
 
Characteristics:
Distinctive flag-like extension on the caudal fin.
Silver-colored body with a streamlined shape.
 
Habitat:
Native to South America, including the Amazon and Orinoco River basins.
 
Behavior:
Typically peaceful and suitable for community tanks.
Prefers being in groups.
 
Tank Size:
Requires a large aquarium. A tank of at least 75 gallons is recommended.
 
Care Level:
Moderate.
Requires good water quality and a well-maintained aquarium.
 
Diet:
Herbivorous. Enjoys a diet that includes high-quality pellets, flakes, and fresh vegetables.
 
Water Parameters:
pH: 6.0-7.5
Temperature: 75-82°F
Hardness: 5-15 dGH
 
Note:
Provide ample swimming space and consider the need for a group setting.
A peaceful fish but may be sensitive to poor water conditions.
 
Disclaimer: "Please note that these are general guidelines, and for more accurate values or specific care requirements, we encourage you to contact Living Aquarium by phone or in person. Within store hours, our team of experts is always happy to answer any questions you may have and provide personalized guidance on care."