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Found in database

order scientific name common name record weight (metric) record weight (anglo-american-system) water country picture
bony tongues Arapaima gigas Arapaima 154,00 kg 339 lb 8 oz Amazon River system Ecuador 2634_Carlos Leopoldo Lima de Oliveira_Pirarucu_Arapaima gigas.jpg
skates and rays Plesiotrygon iwamae Long-tailed River Stingray 19,50 kg 43 lb 0 oz Amazon River system Ecuador 2830_Hiroshi Senou_Long-tailed River Stingray_Plesiotrygon iwamae.jpg
skates and rays Potamotrygon constellata Thorny River Stingray 16,80 kg 37 lb 1 oz Amazon River system Ecuador 2812_Mark Jones_Thorny River Stingray_Potamotrygon constellata.jpg
perch-likes up 10 kg Plagioscion squamosissimus South American Silver Croaker ~ 7,00 kg ~ 15 lb Orinoco River system , Parana River system , São Francisco River system , Amazon River system , rivers of Guianas Ecuador 2962_South American Silver Croaker_Plagioscion squamosissimus.jpg