PROBLEM TO BE SOLVED: To provide a culture system and a cultivation method, which can cultivate fish and shellfish without using a medicine or a filtration device as much as possible by a convenient system even in an inland part.SOLUTION: A culture system for fish and shellfish using a bio-flock comprises: a first breeding tank 10 for breeding fish and shellfish； and a second breeding tank 20 for breeding fish and shellfish different from that of the first breeding tank. The first breeding tank 10 and the second breeding tank 20 are so connected that their breeding waters circulate to each other without through a filtration device.SELECTED DRAWING: Figure 1【課題】内陸部であっても簡便なシステムによって薬剤やろ過装置を極力用いることなく魚介類の養殖が可能な養殖システムおよび養殖方法を提供する。【解決手段】バイオフロックを用いた魚介類の養殖システムにおいて、魚介類を育てる第一飼育槽１０と、第一飼育槽とは別の魚介類を育てる第二飼育槽２０と、を備え、第一飼育槽１０と第二飼育槽２０の飼育水がろ過装置を経ずに互いに循環されるように接続されている魚介類の養殖システム。【選択図】図１
