Don , tough to explain but simple to do with Kings / Wahoo.
EDIT: Found video:
http://youtu.be/UG0TNVvoMNA
Steak them about 3/4 to 1 inch thick.
Cut skin straight down / through until you hit backbone. You've cut about 1/4 way through the steak.
Peel steak backwards - it will butterfly out perfectly - sorta inside out. Toss backbone piece away.
Sure a local can show you - it's great way to prepare fish like King Macs.
Not sure if you ever heard legend of Manatees. Supposedly - they are where the tale of mermaids comes from.
Now I drink - sometimes too much - but no way I'd mistake one of those critters for a mermaid. Not even if at sea for a year
They are cool - too friendly for own good sometimes. Far too many get whacked by boats / props.
Keep reports coming - we might get real mess Monday.