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 (31, 32) and first and second curved end sections (33, 34) is provided within the tank, wherein the active flow control system has a first and a second water inlet arrangement (5a, 5b) for injecting water into the tank and a first and a second water outlet arrangement (6a, 6b) 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 (5a, 5b) 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 (6a, 6b) 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 (31, 32) and first and second curved end sections (33, 34) is provided within the tank, wherein the active flow control system has a first and a second water inlet arrangement (5a, 5b) for injecting water into the tank and a first and a second water outlet arrangement (6a, 6b) 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 (5a, 5b) 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 (6a, 6b) 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.