1 Introduction: neuroanatomy for a neurogenetic model system.- Differentiation of first neurons and their associated tracts and commissures in the embryonic zebrafish brain.- Neuromeres and expression of regulatory genes in the embryonic zebrafish.- Generation of zebrafish mutants via saturation mutagenesis.- 2 Taxonomic background.- 3 Technical details.- Histology.- Preparation of figures.- 4 The brain of the zebrafish Danio rerio: an overview.- Telencephalon.- Diencephalon (including synencephalon and pretectum).- Mesencephalon.- Rhombencephalon (metencephalon and myelencephalon).- Medulla spinalis.- Brain stem/spinal tracts and commissures.- 5 The brain of the zebrafish Danio rerio: a neuroanatomical atlas.- External view.- Cross sections.- Sagittal sections.- Horizontal sections.- 6 Functional anatomy of the zebrafish brain: a comparative evaluation.- Sensory Systems in the teleostean CNS.- Motor and premotor systems in the teleostean CNS.- Integrative centers in the teleostean CNS.- 7 Index of Latin terms.- 8 Index of English terms.- 9 Index of abbreviations.- 10 References.