Como identificar Atum Albacora

Para identificar Atum Albacora (Thunnus albacares), observe estas características principais.

Características físicas

Formato do corpo

torpedo

Coloração

Dark metallic blue to black on the back, fading to silver on the belly. A distinctive golden-yellow stripe often runs along the side. The dorsal and anal fins, as well as the finlets, are bright yellow, giving the species its common name.

Tipo de escama

cycloid

Posição da boca

terminal

Características distintivas

Long, sickle-shaped second dorsal and anal fins in larger adults, which can extend almost to the tail., Numerous small, bright yellow finlets (8-10 dorsal, 7-10 ventral) between the second dorsal/anal fins and the caudal fin., A prominent golden-yellow stripe along the flank, particularly noticeable in fresh specimens., Relatively small eyes compared to body size.

Nadadeira dorsal

Two dorsal fins; the first is spiny and relatively short, the second is soft-rayed and much taller, becoming elongated and sickle-shaped in larger adults. Followed by 8-10 yellow finlets.

Nadadeira caudal

Deeply forked (lunate) caudal fin, characteristic of fast-swimming pelagic fish.

Nadadeira peitoral

Moderately long, extending beyond the origin of the first dorsal fin but not reaching the second dorsal fin origin (a key differentiator from Albacore Tuna).

Nadadeiras características

The elongated second dorsal and anal fins in mature individuals are highly distinctive, often reaching up to 20% or more of the body length.

Dicas de identificação

1. 1

   Fin Coloration

   Look for the bright yellow second dorsal fin, anal fin, and finlets. This is the most obvious distinguishing feature.

2. 2

   Fin Length (Adults)

   In larger specimens, the second dorsal and anal fins are notably elongated and sickle-shaped, sometimes reaching almost to the caudal fin.

3. 3

   Pectoral Fin Length

   The pectoral fin is moderately long, extending past the origin of the first dorsal fin but not reaching the origin of the second dorsal fin. This helps differentiate it from Albacore Tuna (Thunnus alalunga) which has much longer pectorals.

4. 4

   Body Stripe

   A golden-yellow stripe often runs along the side of the body, particularly visible in fresh catches.

5. 5

   Vent

   The vent (anus) is round, not oval or teardrop-shaped, which can be a subtle but useful diagnostic feature.

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