Bigeye Tuna and Similar Species
Thunnus obesus
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Open the appSeveral fish can be confused with Bigeye Tuna. Here are the key differences.
Species often confused with {name}
Yellowfin Tuna
Thunnus albacares
Key differences: Yellowfin Tuna have shorter pectoral fins (rarely reaching past the origin of the second dorsal fin in adults), smaller eyes, and often display prominent yellow dorsal and anal fins (which can be very long in large adults, unlike Bigeye). Their body is typically more slender.
Albacore Tuna
Thunnus alalunga
Key differences: Albacore Tuna have exceptionally long pectoral fins that extend well past the anal fin origin, a more slender body, and a distinct white trailing edge on the caudal fin. Their coloration is also generally lighter.
Bluefin Tuna (Atlantic, Pacific, Southern)
Thunnus thynnus, Thunnus orientalis, Thunnus maccoyii
Key differences: Bluefin Tuna species are generally much larger, have shorter pectoral fins, and a more robust, barrel-shaped body. Their finlets are typically duller in color, and they lack the proportionally large eyes of the Bigeye.
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