Device for confining larvae and/or aquatic organisms, system, method for keeping and cultivating them in aquatic environments

Containment device for larval culture or body water, having a sturdy structure and prismatic hexagonal, is stackable and linkable by means of clamping and clamping is of a polymeric material selected from polyethylene (PE), polyvinyl chloride (PVC), polypropylene (PP) or derivatives thereof, including high density polyethylene (HDPE) having a density lower than water which gives the device a slightly positive buoyancy easily handled in both seawater and fresh water and comprises front, rear and side upper and lower walls, each side wall has interchangeable screen windows with opening or light, where the meshes are fused to the polymeric material and selected from one or more of a nylon mesh, metal mesh or mesh natural fiber with openings sized between 350 microns to 2,000 microns and wherein said mesh to allow entry of surrounding, and further comprising means carries mesh inside which is removable and which separates the internal physical device space bottom or decantation zone particulate material that prevents the larvae is positioned at the bottom of the device, and wherein further the device comprises a screw cap which allows food to enter exogenous including live food or micropellets, as input to a probe or instrument quickly and without removing the device from the marine environment.