Parazoanthus darwini is a zoantharian (family Parazoanthidae) found in the eastern Atlantic and surrounding islands, named in honor of Charles Darwin and forming colonial encrusting polyps on sponges and hard substrates. Like other Parazoanthus species, it produces parazoanthine alkaloids rather than palytoxin-class compounds, reflecting the distinct secondary metabolite chemistry of this zoantharian family. The species contributes to understanding the biogeography of zoantharians in the eastern Atlantic. Genomic data have been generated for this species and are available in public databases, enabling comparative studies of cnidarian evolution and ecology.