roundscale spearfish (Tetrapturus georgii) - Koaw.org
roundscale spearfish (Tetrapturus georgii) - Koaw.org
 white marlin (Kajikia albida) - Koaw.org
white marlin (Kajikia albida) - Koaw.org
 sailfish (Istiophorus platypterus) - Koaw.org
sailfish (Istiophorus platypterus) - Koaw.org
 swordfish (Xiphias gladius) - Koaw.org
swordfish (Xiphias gladius) - Koaw.org
 striped marlin (Kajikia audax) - Koaw.org
striped marlin (Kajikia audax) - Koaw.org
roundscale spearfish (Tetrapturus georgii) - Koaw.org
roundscale spearfish (Tetrapturus georgii) - Koaw.orgFull video on Koaw Nature-YouTube: Identifying the roundscale spearfish from the other billfishes can be done be examining the position of the anal opening, the position of the ends of the branchiostegal rays, and the scales found near the mid-section of the body. Also note the rounded first dorsal and anal fins.Video Link: https://youtu.be/QA723pV2UMk
white marlin (Kajikia albida) - Koaw.org
white marlin (Kajikia albida) - Koaw.orgFull video on Koaw Nature-YouTube: Identifying the white marlin from other other billfishes, especially the the similar in appearance roundscale spearfish, is done by examining the position of the anal opening, the position of the ends of the branchiostegal rays as well as the scales near the mid-section of the body. Also note that, like the roundscale spearfish, the fins are rounded or blunted. Ergo, do not use the fins to distinguish the two species.Video Link: https://youtu.be/QA723pV2UMk
sailfish (Istiophorus platypterus) - Koaw.org
sailfish (Istiophorus platypterus) - Koaw.orgFull video on Koaw Nature-YouTube: Identifying the sailfish is perhaps the easiest to do compared to all of the other billfishes. At least this is true with mature specimens. Just look at that first dorsal fin. The greatest height of the first dorsal fin will be greater than the greatest body depth.Video Link: https://youtu.be/QA723pV2UMk
swordfish (Xiphias gladius) - Koaw.org
swordfish (Xiphias gladius) - Koaw.orgFull video on Koaw Nature-YouTube: Identifying the swordfish from the other billfishes is easily done by looking for pelvic fins and the number of caudal keels. A swordfish doesn’t have pelvic fins and has only 1 caudal keel while every other billfish has 2.Video Link: https://youtu.be/QA723pV2UMk
striped marlin (Kajikia audax) - Koaw.org
striped marlin (Kajikia audax) - Koaw.orgFull video on Koaw Nature-YouTube: Identifying the striped marlin from the other billfishes can get a bit tricky, especially compared to white marlin or blue marlin. Note the very tall first dorsal fin and the position of those branchiostegal rays, as well as the pointed first dorsal and anal fins.Video Link: https://youtu.be/QA723pV2UMk
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