The present invention relates to a shellfish farming apparatus capable of adjusting the upper, middle, and lower underwater illumination of a water tank in consideration of an activity water depth different from a type of a farmed shellfish when cultivating the shellfish and purifying and recycling the water of the franking water tank for cultivating the shellfish. According to the present invention, the shellfish farming apparatus comprises: a water tank (100) receiving water for farming the shellfish, having a light emitting means (110) installed on an upper part, a purified water supply means (120) installed on one side to supply purified water, and including a water discharge means (130) disposed therein to receive the water of the water tank from a lower part and discharge again the water to the lower part through an upper part, an illumination measurement means (140) disposed therein to measure the upper, middle, and lower underwater illumination inside the water tank, a water level sensor (150) disposed therein to measure a water level, an oxygen supply means (160) disposed therein to supply oxygen to the water of the water tank, and a temperature adjustment means (170) disposed therein to maintain the water of the water tank at a target temperature； a filtering means (200) having a plurality of filtering tanks (210) disposed on one side of the water tank at a lower position than that of the upper end of the water discharge means and having a water supply means (220) disposed in the filtering tank to supply the water of the water tank, wherein a filtering material (230) filtering foreign matters supplied from the water supply means is filled in the remainder space except for the water supply means； and a purified water storage tank (300) disposed on the output side of the filtering means and receiving receive purified water purified in the filtering means to supply the purified water to the water tank.COPYRIGHT KIPO 2020본 발명은 갑각류를 육상의 수조에서 양식할 때에 그 양식되는 갑각류의
