Endocrine and osmoregulatory responses to tidally-changing salinities in fishes

•This mini-review summarizes the regulation of hydromineral balance in fish reared in a tidal regime (TR).•Fish in TR compensate for changes in salinity while keeping osmoregulatory parameters within a narrow range.•Branchial ionocytes of fish in TR are similar to those in seawater.•Fish in TR shift from systemic to local regulation of endocrine signaling.