The device illuminates in oro work at the time of small for subaqueous fishing boat or ship submerged for sampling of shellfish can be generated by rotating a screw pipe cut off to prevent lighting of the inner air ratio or screw gear selectively covering the outer surface of the fishing-screw safety cover relates to times (S) and a posterior on both sides bolt fastening the [chwi [chwi] tightly the petal (1) is safety screen filter (3) cover is a "" shaped watch body support it will live (4) is a canvassing pivotable support piece (2) fixing pin (2' ) wherein the push rod to each watch body support it will live side opinion (4) is the intermediate part of the paragraph concubine low [phu [phu] (6) connected with a colored ring (5) and forming a watch body support it will live bottom grade (4) both yearly installments of unfolding is string (8) and fixed clamp (7) is formed of the device safety cover (10) and a sensor are disclosed.