Suzanne Rees, an 80-year-old passenger, was found dead on Lizard Island on the Great Barrier Reef after being left behind by a luxury cruise ship.
Rees was on a 60-day, A$80,000 (US$52,700) round-Australia cruise when the incident occurred on Saturday morning.
The daughter of Suzanne Rees condemned the cruise operator's "failure of care" as authorities launched an investigation into the incident.
Author's summary: Daughter seeks answers after mother's death on Australian cruise.