Annachlamys flabellata is a species of scallop, a marine bivalve mollusc in the family Pectinidae.

[2][3] Annachlamys flabellata is found on sandy seabeds in the neritic zone at depths of down to 127 metres (417 ft) on the coasts of the Australian states of Western Australia, Northern Territory, Queensland and New South Wales, in New Guinea and in Indonesia.

Annachlamys flabellata is found lying on sandy seabeds covered with a thin layer of substrate.

[4] It is a filter feeder, drawing water into its gill chambers through a gap between the valves at the back of the shell.

At the same time as oxygen is being absorbed by the gills, food particles, mostly microscopic algae, are sieved out and transported to the mouth and the water is expelled again.