Zebrafish ABZs is an on-line manual specially designed for the novice who wishes to use zebrafish, Danio rerio, for teaching scientific research or for simple projects. These pages contain basic maintenance procedures needed to successfully raise zebrafish. It is supplemented with protocols for undergraduate developmental laboratories by an embryo development lab and other suggestions for experiments utilizing zebrafish.This guide is a streamlined revision of the more technical The Zebrafish Book (Westerfield, M., ed., 1995) which was written by the staff at the Institute of Neuroscience, University of Oregon, and is used throughout our own facilities as well as zebrafish research labs throughout the world. For more information, contact Jonathan Knight (knight@uoneuro.uoregon.edu)