A bi-metal light weight self penetrating boat anchor includes flukes 18A and 18B and a crown 16 formed of light weight material, such as aluminum, and includes a shank 12 and stock 14 formed of heavier material such as stainless steel. The heavier shank assures that the shank will lie flat on the lake bottom when being dragged by the boat, and the stronger heavier stock resists bending or other deterioration when engaging obstacles at the lake bottom. The reduced weight of the crown and flukes permits the anchor to be of reasonable weight that is more conveniently handled by the boat operator.
