During the late afternoon and the night starfishes go out to hunt mainly bivalve molluscs, which are their favourite preys.

Unlike other Astropecten, this species is active and easy to find during day, especially in early morning and late afternoon.

The inferomarginal plate has a short and pot external spine, arranged with great regularity, normally kept parallel to one another and rather rigid.

The colour of aboral side is pretty clear with various nuances that can be tending towards beige, turquoise-green or grey-brown.

This sea star is a carnivore and feeds on molluscs, which it catches with its arms and then takes to the mouth.