This document presents a review of fish toxicity testing for the regulatory purpose of chemical safety. The main focus is on fish toxicity, but fish bioaccumulation is also considered where relevant. A review of regulatory needs for fish tests under various jurisdictions in OECD countries is provided in Chapter 2, followed by a review of statistical issues and general test considerations in Chapters 3 and 4, respectively. The document examines animal welfare concerns and alternatives to fish tests in Chapter 5. Chapter 6 provides a systematic review of existing and draft OECD Guidelines which use fish for toxicity or bioaccumulation studies. Finally Chapter 7 describes a generic framework for assessing the environmental hazards of chemicals using fish tests in the most efficient way. An Annex contains conclusions and recommendations made and agreed at the workshop in September 2010. The recommendations concern, among other aspects, possible improvements to existing Test Guidelines, development of guidance on specific issues, harmonisation of existing Test Guidelines for common issues, development of new Test Guidelines, and proposals for deletion of outdated Test Guidelines.