| Species |
Gill Rakers on First Gill Arch |
Markings on Lower Body |
Markings on Upper Body |
Trailing Edge of Caudal Fin |
Bottom Surface of Liver |
Pectoral Fin Length |
Finlets |
Length (fork length) & Weight
Maximum |
| Bluefin |
34 - 43 |
Grey spots & bands, sometimes resembles treebark
|
none
|
not white
|
Striated
|
Very short: does not reach origin of second dorsal fin
|
Yellow, often with narrow black margin
|
118+ inches
1000+ lbs
|
| Yellowfin |
26 - 35
|
Chains (20+) of white streaks & spots
|
Yellow gold band on sides, fading at death
|
not white
|
Without striations
|
Extends beyond origin of second dorsal fin
|
Lemon yellow with a very narrow black margin
|
80 inches
400 lbs
|
| Bigeye |
23 - 31
|
none
|
none
|
not white
|
Striated margin
|
Reaches origin of second dorsal fin
|
Yellow with a black margin
|
90 inches
450 lbs
|
| Albacore |
25 - 32
|
none
|
none
|
white
|
Striated
|
Extends beyond anal fin
|
dorsal: yellowish
anal: silver or dusky
|
50 inches
90 lbs
|
| Bonito |
16 - 23
|
none
|
Oblique dark stripes - seven or more
|
not white
|
Without striations
|
very short
|
dusky
|
36 inches
20 lbs
|
| Skipjack |
53 - 63
|
4 - 6 dark longitudinal stripes on belly
|
none
|
not white
|
Without striations
|
very short & broad
|
dusky
|
40 inches
40 lbs
|
| Blackfin |
19 - 25
|
alternating bars & spots, light in color
|
none
|
not white
|
Without striations
|
Reaches origin of second dorsal fin
|
uniformly dusky with white margins
|
40 inches
40 lbs
|
| Little
tunny |
37 - 43
|
Chest spots
|
wavy lines on back
|
not white
|
Without striations
|
short and broad
|
dusky
|
40 inches
35 lbs
|
