Today's we have Brian Fern (@unkolearnuhow), one of my favorite spearfishermen out of Kauai. He's a legend out there and has been diving and sharing his knowledge freely so we can all have more fun diving safely.

Be sure to say hi to him on Instagram!

We cover:

• Comparisons between conventional and roller spearguns
• Prime line limiatations
• Rubber slection
• Roller physics 101
• Manny subs

Brian is a distributor for Manny Sub rollers, so if you're looking for a new setup, be sure to hit him up!

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DEALS: If you want 10% OFF your spearfishing gear, use code CASTANDSPEAR at spearamerica.com.