Fish aggregating device
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A fish aggregating device (FAD) is a man-made object used to attract pelagic fish such as marlin, tuna and mahi-mahi. They usually consist of buoys or floats tethered to the ocean floor. Various types of FADs have been employed in the traditional fishing cultures of Island Southeast Asia, Japan, and Malta for centuries. Modern FADs are increasingly being used in modern commercial and sport fishing.
Echo sounder buoy example model 1
An example echo sounder buoy printed circuit board.
Artificial reef
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An artificial reef (AR) is a human-created freshwater or marine benthic structure.
Typically built in areas with a generally featureless bottom to promote marine life, it may be intended to control erosion, protect coastal areas, block ship passage, block the use of trawling nets, support reef restoration, improve aquaculture, or enhance scuba diving and surfing. Early artificial reefs were built by the Persians and the Romans.
Human-created objects provide hiding places for marine life, like this Sarcastic fringehead
A newly constructed electrified reef set up by Gili Eco Trust in Indonesia.
Constructing an artificial reef using concrete breeze blocks
Oyster castle reef, Gandy's Beach shoreline protection project