Hediste (Nereis) diversicolor, the ragworm, a bristleworm (Polychaeta). Young individuals can be observed under the microscope. Note the fierce fangs inside the proboscis, a retractable head extension. With these ragworms can give a painful bite.

Zoom out to see the whole bristleworm.

Part of the Collection of the Other Invertebrates of the Micropolitan Museum © Wim van Egmond