An anchor includes an anchor shank, a fluke disposed on the leading terminal
side
of the anchor shank as folded back therefrom, and a buoyancy part disposed on the
leading terminal side of the anchor shank. The buoyancy part has a buoyant force
that causes the leading terminal side of the anchor shank to rise upward and the
basal terminal side thereof to contact the water bottom when the anchor is positioned
on the water bottom, allows the leading terminal part of the fluke to remain in
contact with the water bottom under its own weight, and enables the fluke to retain
a posture for forming a given inserting angle relative to the water bottom.
