At the end of the Pleistocene , roughly 13,000 years ago , the Torres Strait connection , the Bassian Plain between modern-day Victoria and Tasmania , and the link from Kangaroo Island began disappearing under the rising sea .
At the end of the Pleistocene , about 13,000 years ago , rising sea levels cut the land access across the Torres Strait to New Guinea , the Bass Strait between Victoria and Tasmania , and to Kangaroo Island .