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 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" .