Cutthroat Eel and Similar Species
Synaphobranchus kaupii
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Open the appSeveral fish can be confused with Cutthroat Eel. Here are the key differences.
Species often confused with {name}
Shortfin Cutthroat Eel
Synaphobranchus brevidorsalis
Key differences: S. brevidorsalis typically has a shorter dorsal fin origin relative to the anus and may have slightly different vertebral counts. The gill opening shape can also vary subtly, though both share the 'cutthroat' characteristic.
Longfin Cutthroat Eel
Synaphobranchus affinis
Key differences: S. affinis generally has a longer dorsal fin origin, starting further forward on the body compared to S. kaupii. Morphometric measurements and vertebral counts are crucial for definitive identification.
Arrowtooth Eel
Dysomma anguillare
Key differences: While also a deep-sea eel, Dysomma anguillare belongs to a different family (Synaphobranchidae, but different subfamily Dysomminae) and has a more robust body, a shorter snout, and different dentition. Its gill openings are typically smaller and more lateral, not exhibiting the pronounced 'cutthroat' appearance.
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