American Eel and Similar Species
Anguilla rostrata
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Open the appSeveral fish can be confused with American Eel. Here are the key differences.
Species often confused with {name}
European Eel
Anguilla anguilla
Key differences: The primary distinguishing feature is vertebral count. American Eels typically have 103-110 vertebrae, while European Eels have 110-119. This requires dissection for definitive identification. In the field, their geographic ranges generally do not overlap significantly, though some overlap may occur in the North Atlantic.
Sea Lamprey
Petromyzon marinus
Key differences: Lampreys lack jaws, pectoral fins, and pelvic fins. They possess a distinctive circular, sucking mouth with rows of teeth. Their gill openings are seven small, pore-like holes along the side of the head, whereas eels have a single, slit-like gill opening.
Conger Eel
Conger oceanicus
Key differences: Conger eels are typically larger, lack scales, and have a more pointed snout. Their dorsal fin originates much closer to the pectoral fins than in American Eels. They are exclusively marine, while American Eels are catadromous.
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