Pteroeides griseum is a sea pen (order Pennatulacea, family Pteroeidae) found in soft-sediment benthic habitats of the Indo-Pacific, forming characteristic upright, feather-shaped colonies with alternating rows of leaf-like polyp-bearing branches arranged along a central axis. Sea pens occupy an important ecological niche in soft-sediment environments, providing structural habitat for associated invertebrates. Sea pen populations are increasingly threatened by bottom trawling and sediment disturbance from human activities. Genomic data have been generated for this species and are available in public databases, enabling comparative studies of cnidarian evolution and ecology.