Fish-gathering block

A fish-gathering block comprising a base frame, a plurality of separate supports erected on and projecting upwardly from the base frame, a ceiling means spaced upwardly above the base frame and mounted on the supports adjacent the upper ends thereof, a plurality of vertically-stacked vertical wall units positioned between the base frame and the ceiling unit, each wall unit having a plurality of vertical walls, and substantially horizontal shelf means interposed between the lowest wall unit and said ceiling means, said lowest wall member being held by said supports so as to leave a current flow-through space above said base frame and below the lowermost wall unit.

A fish-gathering block comprising a substantially flat and horizontally enlarged base frame adapted to be deposited on the sea-bottom, a plurality of separate upright supports removably attached to said base frame and projecting upwardly therefrom, said supports being positioned in an angularly spaced-apart relationship, a top wall structure supported on said upright supports adjacent the upper ends thereof so as to be vertically spaced upwardly above said base frame, said top wall structure extending across the region defined between said supports, and at least one vertical wall unit disposed within the region between said supports and positioned vertically between said top wall structure and said base frame, said vertical wall unit including a plurality of vertical walls with a different one of said vertical walls being connected to and projecting inwardly into the region from each of said upright supports, whereby said vertical walls in cooperation with said supports define a plurality of spaces within said region which are bounded by said vertical walls and open sidewardly of the block between a pair of adjacent upright supports, and means supporting said wall unit in vertically spaced relationship above said base frame so as to leave a current flow-through space above said base frame and below said wall unit.