Abstract: An apparatus for collecting shellfish and the like at the bottom of a body of water comprising a rake having a number of inclined tines or teeth adapted to scrape the bed of the body of water, sliding boxes or runners for holding the tines at a substantially constant angle relative to the bed and a bag net rearwardly of the rake for collecting the shellfish dug up or scooped up by the tines. The apparatus is towed or dragged by a boat or by a rope to be wound by a winch on a boat to collect the shellfish effectively without devastating the water bed and without collecting infant shellfish falling down between the tines, with the result that the resources at the bed of the water are preserved.

Abstract: A light weight trail groomer is supported at its rear end on each side by a pair of longitudinally aligned skis connected to respective arms of a bracket pivotally mounted on a main frame element. The frame structure is arranged for connection at its forward end to a towing vehicle and includes a scraper blade structure the height of which can be adjusted by independent adjuster means connected between an auxiliary frame structure and each one of the main frame elements.