Outlet basin for a fish pen

Abstract

An outlet basin for a fish pen is provided with at least one outlet hose extending from the outlet basin to a surface. The outlet basin includes a cylinder-shaped housing which is provided, at its upper portion, with a mounting collar arranged to be attached to a bottom portion of the fish pen, and which is provided, at its lower portion, with a through opening. The outlet basin further includes a cylinder-shaped outlet channel which, in a portion, is housed in the housing, the outlet channel is provided, at its upper portion, with a strainer covering the cross section of the outlet channel, an elongated annular space between the housing and the outlet channel, a slanted grating covering the entire annular space, the lowermost portion of the slanted grating being positioned just below the opening of the housing, a slanted bottom plate sealingly covering the entire annular space, and a lower through opening at the lowermost portion of the bottom plate.

1 . A closed fish pen, wherein the wall comprises a fluid-tight material, the fish pen is at a spherical upper portion provided with buoyancy means in a water surface and with an inlet for water, and the fish pen is provided, in a conical shaped lower portion, with an outlet; wherein the depth D of the fish pen constitutes the distance from the water surface to the outlet,
 wherein   the conical lower portion meets tangentially the spherical upper portion.   
     
     
         2 . The closed fish pen according to  claim 1 , wherein the conical lower portion exhibits a depth D c  which constitutes about one half of the depth D. 
     
     
         3 . The closed fish pen according to  claim 1 , wherein the conical lower portion exhibits a depth D c  which constitutes about one fourth of the depth D. 
     
     
         4 . The closed fish pen according to  claim 1 , wherein the conical lower portion exhibits a depth D c  which constitutes about between one half and one fourth of the depth D.