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Once you’ve collected your sample, it’s a good idea to place the net contents into a shallow white tray with enough water to allow invertebrates to swim or crawl (they may be hard to see until they start moving). You may need to spread your sample over several trays to see a wide range of invertebrates. You can do this in the field, or take the sample material back to the lab or classroom for a closer look. Of course magnifying glasses or microscopes will allow you to see the invertebrates in a great deal more detail.