AbbVie 1 article published in JoVE Biology High-throughput Measurement of Gut Transit Time Using Larval Zebrafish Steven Cassar1, Xin Huang2, Todd Cole3 1Preclinical Safety, AbbVie, 2Statistics, AbbVie, 3Integrated Science and Technology, AbbVie The goal of this protocol is to measure the transit time of fluorescently labeled food through the gut of larval zebrafish in a high throughput fashion.