The fish early life-stage (FELS) test guideline (OECD 210 or OCSPP 850.1400) is the most frequently used bioassay for predicting chronic fish toxicity and supporting aquatic ecological risk assessments around the world.
Adverse Outcome Pathways During Early Fish Development: A Conceptual Framework for Identification of Chemical Screening and Prioritization Strategies
Toxicological Sciences, 2011