Abstract: An anchor which includes an anchoring head having slidably mounted relative thereto a frame which, in turn, carries a slip ring for the anchor cable. The anchor head includes a plurality of mud barbs joined by sand plates for firm anchoring in a bottom. The frame is generally triangular in outline and includes a sliding bar which is slidably mounted relative to the anchor head. The slip rings for the anchor cable is slidably mounted on one leg of a reversible bar of the frame, and has connected thereto a cable which has connected to its opposite end a float in such a manner that once the anchor has been positioned and the anchor cable has been slackened, the slip ring will be automatically pulled by the float from a position at the upper part of the frame to a position at the lower rear corner of the frame. A counter-weight is positioned at the lower rear corner of the frame and, if desired, may have a rearwardly extending spade for digging into the bottom.