Underwater device for submersible artificial fish habitat and uses thereof

The present disclosure relates to a structural arrangement applied in a fish housing to provide an artificial habitat and refuge environment to congregate, in lentic environments (lakes, dam reservoirs or ponds), freshwater fish with significantly territorial behaviours which need individual underwater shelters. More specifically, this disclosure concerns to a large-size, complex and adaptable underwater structure for sheltering species of fish usually targeted by recreational fisheries, promoting the development of fish with sufficient size to be considered “trophy” specimens.