What specific anatomical feature defines the long pelvic fins of the white marlin?
Answer
They reach the origin of the anal fin.
The pelvic fins of the white marlin possess a notable length that serves as a crucial physical trait for species identification among billfish found in similar regions. Specifically, these fins are described as being very long, extending posteriorly far enough to physically reach the point where the anal fin begins its origin on the underside of the fish's body.
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