Blue Trevally
Males are commonly 60 cm (Total Length) in length when caught/marketed, but may be as large as 117 cm (Fork Length). Their average weight is 10 lbs.but in Panama, you will often see much larger bluefins around 30 lbs. or more. They can grow to be 100 cm (3.28 feet) in length. 
The trevally uses camouflage for added protection from predators. Its magnificent blue color helps it to blend in with the clear blue waters of its habitat. Furthermore, it displays countershading camouflage, which means that its dorsal (top) side is darker than its ventral (bottom) side. If a predator is looking from above, the dark back of the trevally blends in with the dark ocean bottom, but if the predator is looking from below, the lighter belly of the trevally blends in with the glare of the sun and the light coming from above water. |
