[2] Colonies of K. aestuarii have colorations ranging from white to deep ochre, due to the presence of the iron chelate pulcherrimin in the cells.

[3] The cells are globose to ellipsoidal in shape when grown on Yeast-Mold (YM) agar, and range between roughly 2–6×3–7 μm in size.

Pseudohyphae formation occurs after roughly two weeks of growth on corn meal agar.

[1] It has also been discovered in the Torres Strait of Australia,[4] as well as in a mangrove forest near Rio de Janeiro, Brazil, where it was isolated from a shipworm (Neoteredo reynei), a clam (Tagelus plebius), and two crab species (Sesarma rectum and Uca spp.).

[5] K. aestuarii has been identified as a possible indicator organism for environmental pollution of mangrove forests.