Gallery 3.4: Testing Tuna Identification Quiz

Top: Yellowfin Tuna 
Bottom: Bigeye Tuna 
(Photo: David Itano)

Top: Bigeye Tuna 
Bottom: Yellowfin Tuna 
(Photo: David Itano)

Top: Bigeye Tuna 
Bottom: Yellowfin Tuna 
(Photo: David Itano)

From top, the first three are "False Tunas" (see Chapter 4). 
Bottom three are: Yellowfin tuna, Bigeye tuna, and Skipjack. 
(Photo: David Itano)

 

Answer: best estimates are: 
YFT: close regular line pattern, long body, caudal notch 
BET: large head and eye, irregular line pattern 
YFT: Thick, short pectoral fin, possible regular marking pattern 
BET: long pectoral fin, no sharp caudal notch 
BET: long pectoral fin, deep body 
YFT: close regular line pattern, short pectoral fin, small eye 
BET: long pectoral fin, widely spaced line pattern 
YFT: short pectoral, close, regular line pattern, caudal notch possible 
YFT, possibly: short head, close line-and-dot pattern, but long pectoral fin (needs closer look) 
BET: long pectoral fin pointing down, vertical white lines, deep body 
YFT: close line-and-dot pattern 
BET: long pectoral fin with thin tip, widely spaced vertical white lines 
(Photo: David Itano)

Yellowfin Tuna 
(Photo: David Itano)