Foraminifera under the microscope (IMAGE) Woods Hole Oceanographic Institution Caption View through the eyepiece of a dissecting microscope showing a group of 25 N. stella foraminifera. Foraminifer are extremely abundant on Earth. Most are only about 300 microns in diameter. Credit Ocean Exploration Trust, NOAA Ocean Exploration, and NASA Usage Restrictions none License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.