Plakina nathaliae

Plakina nathaliae is a species of sea sponge in the order Homosclerophorida, first found in vertical walls of reef caves at depths of about 23 to 28 m in the Caribbean Sea. It has a leaf-like flat body, which is loosely attached to the substrate and a perforated, unlobate surface; it contains two bacterial s and is characterized by two mesohylar cell types with inclusions.

In March 2017, the species was reassigned to Plakina Schulze, 1880.