What specific metric differentiates the White Marlin's jaw length relative to its head structure?
Answer
Upper jaw length is typically shorter than the head measured from the back of the eye
Fisheries biologists rely on precise, measurable morphological markers to confirm the identity of *Kajikia albida* and distinguish it from similar species within the Istiophoridae family. One definitive metric involves comparing proportional lengths of cranial structures. Specifically, for the White Marlin, the length of the upper jaw is generally shorter when compared to the measurement taken for the length of the head starting from the posterior margin of the eye. This subtle skeletal difference provides a quantifiable separation between *Kajikia* and other marlin groups, underpinning its specific taxonomic placement.
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