Fish farming tank for cultivating living fish, wherein the tank comprises an active flow control system for generating a circulating flow of water within the tank , wherein the tank has an elongated stadium shape with an elongated partition located centrally along a longitudinal direction of the tank , as seen from above, such that a continuous tank channel with first and second parallel longitudinal channel sections and first and second curved end sections is provided within the tank , wherein the active flow control system has a first and a second water inlet arrangement for injecting water into the tank and a first and a second water outlet arrangement for removing water from the tank , wherein the first water inlet arrangement is a major first water inlet arrangement and the second water inlet arrangement is a major second water inlet arrangement, whereby the major first and second water inlet arrangements are configured to together inject a majority of the water injected into the tank , wherein the first water outlet arrangement is a major first water outlet arrangement and the second water outlet arrangement is a major second water outlet arrangement, whereby the major first and second water outlet arrangements are configured to together suck out a majority of the water sucked out from the tank , said fish farming tank being characterized in that the first water inlet arrangement is located at a first longitudinal end region of the partition and configured for injecting water into the first longitudinal channel section , wherein the second water inlet arrangement is located at a second longitudinal end region of the partition and configured for injecting water into the second longitudinal channel section , wherein the first water outlet arrangement is located at the first longitudinal end region of the partition , and wherein the second water outlet arrangement is located at the second longitudinal end region of the partition . wherein the tank has an elongated stadium shape with an elongated partition located centrally along a longitudinal direction of the tank , as seen from above, such that a continuous tank channel with first and second parallel longitudinal channel sections and first and second curved end sections is provided within the tank , wherein the active flow control system has a first and a second water inlet arrangement for injecting water into the tank and a first and a second water outlet arrangement for removing water from the tank , wherein the first water inlet arrangement is a major first water inlet arrangement and the second water inlet arrangement is a major second water inlet arrangement, whereby the major first and second water inlet arrangements are configured to together inject a majority of the water injected into the tank , wherein the first water outlet arrangement is a major first water outlet arrangement and the second water outlet arrangement is a major second water outlet arrangement, whereby the major first and second water outlet arrangements are configured to together suck out a majority of the water sucked out from the tank , said fish farming tank being characterized in that the first water inlet arrangement is located at a first longitudinal end region of the partition and configured for injecting water into the first longitudinal channel section , wherein the second water inlet arrangement is located at a second longitudinal end region of the partition and configured for injecting water into the second longitudinal channel section , wherein the first water outlet arrangement is located at the first longitudinal end region of the partition , and wherein the second water outlet arrangement is located at the second longitudinal end region of the partition . <EOS>