Figure 1. Brain diversity in ray-finned fishes. Simplified schematic drawings of three brains from otophysans (members of the 'Otophysi clade', that is, a subgroup within ray-finned fishes). Top: zebrafish, bottom left: catfish; bottom right: goldfish. Note how different these brains look despite being from relatively close related species. Abbreviations mark some common divisions or regions in the brain: C, cerebellum; H, hypothalamus; MO, medulla oblongata; OT, optic tectum; T, telencephalon.
{}