Use a lighter and....
JUST KIDDING!!! LOL
"there was fuel in the bilge" and "Noticed fuel through the front hatch drain hole and the anchor chain was soaked in fuel. Took the port side speaker out and saw fuel puddled by the fuel cell. Same side as the vent. No idea how that got there."
I would start your search at the tank. Try to do a full visual inspection. If it's pooling then good chances you should be able to find the leak upstream. However if the bottom of the tank has a crack or pin hole leak then it may be harder to find. They make a florescent dye you can put in your fuel tank to help pinpoint the leak.
Get a UV light if you don't already have one.
Good luck!
JUST KIDDING!!! LOL
"there was fuel in the bilge" and "Noticed fuel through the front hatch drain hole and the anchor chain was soaked in fuel. Took the port side speaker out and saw fuel puddled by the fuel cell. Same side as the vent. No idea how that got there."
I would start your search at the tank. Try to do a full visual inspection. If it's pooling then good chances you should be able to find the leak upstream. However if the bottom of the tank has a crack or pin hole leak then it may be harder to find. They make a florescent dye you can put in your fuel tank to help pinpoint the leak.

Amazon.com: ACDelco 1148963 GM Original Equipment 10-5045 Multi-Purpose Fluorescent Leak Detection Dye - 1 oz : Automotive
Buy ACDelco 1148963 GM Original Equipment 10-5045 Multi-Purpose Fluorescent Leak Detection Dye - 1 oz: Leak Detection Tools - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
Get a UV light if you don't already have one.

Amazon.com: Escolite UV Flashlight Black Light, 51 LED 395 nM Ultraviolet Blacklight Detector for Dog Urine, Pet Stains and Bed Bug : Pet Supplies
Amazon.com: Escolite UV Flashlight Black Light, 51 LED 395 nM Ultraviolet Blacklight Detector for Dog Urine, Pet Stains and Bed Bug : Pet Supplies
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Good luck!