Labor day fishing - Kayak Fishing Adventures on Big Water’s Edge

YakMedic · 09-04-2012, 03:02 PM

First off thanks for the report.

Second, the swim bladder is what creates the tell tale arch seen on a sonar. Ultrasound does not get a return from air so a fish mark shows as an arch due to fish shape and swim bladder. With this thought process you will still see a seven gill shark, it just won't appear as an arch. The same way we see structure on a finder.

Thanks again Aaron and Julie for the timeliness.

09-04-2012, 03:02 PM	#13
YakMedic Senior Member Join Date: Feb 2011 Location: Wrightwood Posts: 623	First off thanks for the report. Second, the swim bladder is what creates the tell tale arch seen on a sonar. Ultrasound does not get a return from air so a fish mark shows as an arch due to fish shape and swim bladder. With this thought process you will still see a seven gill shark, it just won't appear as an arch. The same way we see structure on a finder. Thanks again Aaron and Julie for the timeliness.