Although most sampling of choanoflagellates has occurred between 0 m and 25 m, they have been recovered from as deep as 300 m in open water and 100 m under Antarctic ice sheets.
Aínda que a maioría das mostras de coanoflaxelados recóllense entre 0 m e 25 m de profundidade, foron tamén recollidas ata profundidades de 300 m en augas abertas e a 100 m baixo os casquetes de xeo antárticos.