PURPOSE:To obtain a crawl for culture capable of protecting an aquatic life in the crawl in storm or at high water temperature by constructing so as to integrally separating plural unit crawls fixed to a body from the above- mentioned body and sinking to arbitrary depth in the sea. CONSTITUTION:In the above-mentioned crawl for culture, plural unit crawls 1 are provided to each frame of a lighter type platform boat body 3 constructing plural frames. The above-mentioned plural unit crawls 1 are fixed to the body 3 integrally with the frame 2 consisting of steel pipe, etc. As necessary, the above-mentioned crawls are constructed so as to be separated from the body 3 and sunk to an arbitrary depth in the sea by a lifting and descending device and installed in the sea. When a rainstorm comes on, e.g., typhoon, etc., approaches or water temperature is high, the frame 2 is sunk in the sea and when the state returns to normal state, the frame 2 is raised again. Furthermore, in the figure, 4, 9 and 19 show a floating material, binding material and wire for mooring the body, respectively.
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