On general fauna surveys we normally only record animals with backbones, as there are so many invertebrate species that you really need to be a specialist in that field. On some surveys we have specialists that record Stigofauna, which are mainly newly discovered invertebrates living in underground water and short range endemics (SRE's), which are invertebrates that are usually found in one area and nowhere else.
Here's a few big invertebates we found on recent coastal surveys.
These big black Mygalomorph spiders are sometimes found in pit traps in the morning. They are super aggressive and you can hear their fangs hitting the metal tongs that we often use to remove things from pits. I wouldn't want one to reach my finger!