develops from start stage end stage otic vesicle TAO:0000051 ZFA:0000051 ov otocyst Epithelial sac present beside the fifth rhombomere; forms the semicircular canals dorsally and the otolith organs ventrally, and houses the acoustico-vestibular sensory epithelia (maculae) of hair cells. (Also see Anatomical Atlas entry for <a href='http://zfin.org/zf_info/anatomy/dict/ear/ear.html'>ear</a> by T. Whitfield.) otic capsule zebrafish_anatomy otic placode embryonic structure unknown segmentation:14-19 somites