Check out my video with 2 Osmo Actions on a Kayak.
I use the external mic adapters and power via a 12amp hour batter all day and just let them record
continously.  I have to do this because there is no remote control available.
I used to do this with GP cams but I had nothing but trouble with them, they would overheat and the cams would become out
of sync.  With the Osmo Actions they are much more reliable for extended recording.

Hello there snorkel. Thank you for reaching out and for posting this cool video you have filmed using your DJI Osmo Action. Great catch! Have a safe and a happy fishing and filming always. .

Nice work!

Nicely done.    

Very good

Very cool video

Great video, and good catch