(I–J) Confocal images of Tg(neurod1:RFP); Tg(ef1α:xbp1δ-GFP) zebrafish intestine in 6 hr HF fed larvae (I) and 6 hr HF fed with 0.5 mM orlistat treated larvae (J). The gene discussed is NEUROD1; the disease is hydrops fetalis.