Abstract: This disclosure relates to apparatus and methods for recovering metals from fluid body(s) using electrodeposition, for instance for the recovery of metals from underwater/oceanic sources, e.g., in the vicinity of hydrothermal vents. It provides apparatuses for recovering at least one target metal substance from a body of a fluid, comprising: at least one pair (comprising a cathode and an anode) of electrodes, such that when the apparatus is used, at least one pair of the electrodes is presented to the body of fluid; and means for generating an electrical potential difference across the at least one pair of electrodes, so that the potential difference generated across the pair is such as to attract target metal substance(s) present in the body of fluid, for deposition on at least one cathode on the apparatus. It also provides methods for recovering metals from a body of fluid using electrodeposition and the described apparatus.