Oyster fry breeding system

The invention discloses an oyster seed breeding system which is characterized in that a circular truncated cone is fixed to a first tank body, the first tank body is provided with a water inlet hole, and the circular truncated cone is provided with a water inlet channel communicated with the water inlet hole; a gap is formed between the lower end wall of the tank body II and the inclined side surface of the circular truncated cone body; a water outlet pipe with a water outlet is fixed with the tank body II, and the lower end of the water outlet pipe abuts against the upper bottom surface of the circular truncated cone; the lower end of the tank body I is arranged in the tank body III; the annular pore plate is fixed in the third tank body, and annular filter cotton is laid on the upper plate surface of the annular pore plate; the water pump is arranged in the third tank body and communicates with the water inlet hole. Water in the second tank body stably flows from top to bottom all the time, the water in the