Belif fin system, anyone heard of it?

anyone know anything about the belif fin system (I think thats waht its called...)?
It consists of two shallow long fins on the sides, and a big fin in the middle, then double concave between the fins. Anyone know about this?
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It consists of two shallow long fins on the sides, and a big fin in the middle, then double concave between the fins. Anyone know about this?
picture won't load...