Textularia is a genus of textulariid foraminifera. It includes many vagile inbenthic species of normal salinity seawater.
References
Further reading
Parker, Justin H.; Gischler, Eberhard (September 2010). "Modern foraminiferal distribution and diversity in two atolls from the Maldives, Indian Ocean". Marine Micropaleontology. 78 (1–2): 30–49. doi:10.1016/j.marmicro.2010.09.007.