Other introduced species include common iceplant, Capeweed great brome grass, slender thistle false caper and hedge mustard.

Other native species include ruby saltbush, Australian hollyhock, climbing lignum, variable groundsel and bower spinach.

Reptiles recorded included marbled geckoes, three species of skink, sleepy lizards (Tiliqua rugosa) and tiger snakes (Notechis scutatus).

Introduced species such as cat, feral pigeon, goat, house mouse and rabbit have been present in the past and as of 2009, have been either eradicated, reduced or controlled.

[3] Little penguins are also known to breed on Goose Island, and have been seen there since at least 1935, when they were reported coming ashore "in great numbers" at night, and occupying burrows by day.