About This Field Guide

Trade Pathways Field Guide is an independent publication about practical controls for aquatic organisms in commerce. It serves sellers, shippers, marketplaces, educators, inspectors, and other readers who need a clear way to document pathway risk.

The publication uses current primary sources where possible and separates general operational guidance from legal requirements. It does not provide legal advice, species identification, permits, emergency response, or agency services.

This domain previously hosted a different funded project. Read the former-project notice for the identity boundary.