1. a large freshwater fish of the family Osteoglossidae, native to South America and Southeast Asia, characterized by a bony tongue-like structure and often kept in aquariums
Usage: also called arowana; common in aquarium hobby

Examples

• The bonytongue is a prized aquarium fish known for its striking appearance.
• Collectors often seek rare varieties of bonytongue for their tanks.
• The bonytongue uses its bony tongue to manipulate food in its mouth.
• In its native habitat, the bonytongue can grow quite large.
• Many aquarists consider the bonytongue one of the most impressive freshwater fish.