Charles Turu Tumahai (14 January 1949 – 21 December 1995)[1] was a New Zealand singer, bass player and songwriter who was a member of several noted rock groups in New Zealand, Australia and the UK.

He is best known internationally as the bassist and backing vocalist in Bill Nelson's Be-Bop Deluxe.

Tumahai was born in Ōrākei, Auckland, New Zealand, where he began his music career before moving to Australia in the late 1960s.

In 1980 he joined Tandoori Cassette, a group featuring ex-members of Nazareth, Jethro Tull and The Sensational Alex Harvey Band, however this group did not make any recordings except a single "Angel Talk" c/w Third World Briefcases.

[4][1] He died suddenly after suffering a heart attack while working at the Auckland District Court on 21 December 1995, at age 46.