Cover legend: This image shows qrfp- (green) and vasoactive intestinal polypeptide (vip)-expressing neurons (red) in a larval zebrafish brain. The qrfp-expressing neurons have dense projections in the hypothalamus, sparse projections to the forebrain, and projections to the hindbrain that extend down the spinal cord. vip is expressed in several hypothalamic populations that do not colocalize with qrfp-expressing neurons. The accompanying video shows qrfp (green) and hcrt (red) in an adult brain. Blood vessels (yellow) and a region of the forebrain that was damaged during dissection (opaque yellow region) can also be observed. For more information, see the article by Chen et al. (pages 1823–1840).

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