HMNZS Tui (T234) was a Bird-class minesweeper of the Royal New Zealand Navy.

She was commissioned in 1941 for minesweeping and anti-submarine roles. Tui was the first of two ships with this name to serve in the Royal New Zealand Navy and was named after a native bird from New Zealand.
Oceanographic research
. On 5 March 1956, the now disarmed Tui was recommissioned and reclassified as a fleet auxiliary. She made many scientific cruises for the DSIR and NRL to places around New Zealand and Pacific islands. She investigated shipwrecks, notably MV Holmglen off Timaru in 1959 and MV Kaitawa off Cape Reinga in 1966.

Fate
Tui was decommissioned for the last time on 22 December 1967. She was stripped of her equipment and sold in December 1969 to Pacific Scrap Ltd who demolished her. She was replaced in 1970 by a purpose-built oceanographic ship with the same name.