BREAKWATER INCORPORATED FISH PRESERVE

PROBLEM TO BE SOLVED: To provide a strong fish preserve with the excellent fixation of benthic fish and shellfish capable of keeping fresh sea water at all times by aggressively discharging remaining feed and excreta to the outside. SOLUTION: A caisson 3 for constituting a breakwater 1 is provided with a water passing path 9 from a front surface side to a rear surface side and a fish preserve formation body 11 is integrally installed on the rear side wall of the caisson 3. A partition wall 12 is provided inside the fish preserve formation body 11, one side is formed into a free water part 14 communicating to the water passing path 9 and the other side is formed into a fish preserve part 15. The height of the partition wall 12 is set lower than the fish preserve formation body 11 and the sea water is made to overflow from the free water part 14 to the fish preserve part 15. A communication hole 16 for communicating the free water part 14 and the fish preserve part 15 is formed on the partition wall 12 and a discharge hole 17 is formed on the fish preserve formation body 11 opposing the communication hole 16. At the bottom panel 19 of the fish preserve part 15, the discharge groove 20 of the remaining feed or the like is formed.