heptapterid
Quick Summary
The term "heptapterid" refers to fish belonging to the family Heptapteridae. These are freshwater fish found from Mexico to South America. They are superficially similar to fish in the family Pimelodidae.1
The term "fish" is a broad category encompassing a vast array of aquatic vertebrates. Britannica's classification of fish includes numerous orders and families, such as Ostariophysi, which contains diverse groups like characins, catfish, and minnows. Another unrelated group, hatchetfish, are small, deep-sea fishes known for their light organs, or freshwater species that can glide short distances using their pectoral fins.12
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