The culture tank is designed to have a bottom surface of the accommodating space of the main body, and at least one groove-shaped concave portion communicating with the accommodating space and a tube body arranged under the concave portion and communicating with the concave portion are formed on the bottom surface. The design of the sloped bottom surface is matched with the groove-shaped recess and the side-by-side tube body to facilitate concentration of pollutants into the recess and the tube body.一種養殖槽，係將其本體之容置空間之底面設計為斜坡狀，且於該底面形成至少一連通該容置空間之槽狀凹部及並排設於該凹部下方且與該凹部連通之管體，俾藉由該斜坡狀底面配合槽狀凹部及並排管體之設計，以利於將汙染物集中至該凹部及管體中。
