Answer: Single-celled marine organisms
Notes: A global review has identified 57 new living species of foraminifera. Foraminifera, or forams, are single-celled marine organisms found in oceans, coasts, and estuaries. Most have shells and are either planktonic (float in water) or benthic (live on sea floor). They are generally under 500 microns in size, though some tropical species reach 20 cm. Their name comes from foramen (Latin for window), with holes in shells for pseudopodia to gather food. They eat detritus, diatoms, bacteria, algae, and tiny animals like copepods. Shells are made of calcium carbonate (calcareous) or sand grains (agglutinate) with one or multiple coiled chambers.
