PROBLEM TO BE SOLVED: To provide a land rearing device of tuna, increasing a survival rate of juvenile fish and immature fish of tuna.SOLUTION: A land rearing device of tuna as a land rearing device which includes an immature fish rearing tank 2 for rearing juvenile fish of tuna until they become immature fish is such that the immature fish tank 2 has a first pipe arrangement 3 for receiving juvenile fish completed in rearing in a juvenile fish rearing tank 1 for rearing juvenile fish, in the immature fish tank 2 by water flow from the juvenile fish rearing tank 1. The water flow is preferably water flow formed under natural flow based on a difference of elevation between the juvenile fish rearing tank 1 and the immature fish tank 2.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】マグロの稚魚及び未成魚の生残率を高める陸上飼育装置を提供すること。【解決手段】マグロの稚魚を未成魚になるまで飼育する未成魚飼育槽２を備えた陸上飼育装置であって、前記未成魚飼育槽２は、稚魚を飼育する稚魚飼育槽１での飼育を終えた稚魚を前記稚魚飼育槽１から水流によって未成魚飼育槽２に受け入れるための第１配管３を有することを特徴とするマグロの陸上飼育装置。前記水流は稚魚飼育槽１と未成魚飼育槽２との間の高低差に基づく自然流下によって形成された水流であることが好ましい。【選択図】図１
