Longtail Tuna and Similar Species
Thunnus tonggol
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Open the appSeveral fish can be confused with Longtail Tuna. Here are the key differences.
Species often confused with {name}
Yellowfin Tuna
Thunnus albacares
Key differences: Yellowfin Tuna typically have shorter pectoral fins that do not reach the origin of the second dorsal fin. They also often display bright yellow finlets and a prominent yellow stripe along the flank. Internally, Yellowfin Tuna have striations on the ventral surface of the liver.
Bigeye Tuna
Thunnus obesus
Key differences: Bigeye Tuna have significantly longer pectoral fins, often reaching well past the end of the second dorsal fin base. They also possess larger eyes relative to body size and have striations on the liver, similar to Yellowfin Tuna.
Kawakawa
Euthynnus affinis
Key differences: Kawakawa (Mackerel Tuna) are generally smaller, have a more robust body, and possess distinct dark spots and wavy lines on their back and upper sides. Their pectoral fins are much shorter, and they lack a swim bladder.
Skipjack Tuna
Katsuwonus pelamis
Key differences: Skipjack Tuna are characterized by 4-6 prominent dark longitudinal stripes on their belly, which are absent or very faint in Longtail Tuna. Skipjack also have a more robust body shape and shorter pectoral fins.
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