Abstract: Materials and methods for prevention of biofouling are described that incorporate the presence of a conotoxin peptide on a surface. The conotoxin peptide is either directly or indirectly adhered to the surface and interferes with the ability of biofouling organisms to settle on the surface.

Abstract: A variable interface putter golf club includes a golf club having a shaft with a club head affixed to a first end of the shaft that is distil from a second end of the shaft to be gripped by a golfer. A multi-sided rotatable carousel is contained substantially within the club head of the golf club, the multi-sided rotatable carousel having a putter face on a plurality of sides of the multi-sided rotating carousel. The multi-side rotating carousel preferably is shaped as a pentagon with a different putter face on each of the five sides of the pentagon. A device is included for permitting rotation of the multi-sided rotatable carousel for exposing one putter face of the plurality of putter faces at a given time for allowing the golfer to putt with the one putter face so exposed.