Foraminifers

Foraminifera (/fəˌræməˈnɪfərə/, Latin meaning hole bearers; informally called "forams") are members of a phylum or class of amoeboid protists characterized by: streaming granular ectoplasm for catching food and other uses; and commonly an external shell (called a "test") of diverse forms and materials. Tests of chitin (found in some simple genera, and Textularia in particular) is believed to be most primitive type. Most foraminifera are marine, the majority of which live on or within the seafloor...