This image shows the reticulospinal neurons of a larval zebrafish. These neurons form a highly stereotyped population which provide the main descending control to the spinal cord, and are involved in producing different types of motor output in larval zebrafish. Each cell has a unique label and can be identified by its distinct morphology and projection patterns. In this image, the varying colours describe the depth of these neurons in the zebrafish hindbrain, with purple representing a dorsal position, and yellow representing a more ventral position.