Enables protein N-terminus binding activity. Predicted to be involved in several processes, including equilibrioception; photoreceptor cell maintenance; and regulation of cytosolic calcium ion concentration. Predicted to act upstream of or within several processes, including animal organ morphogenesis; righting reflex; and sensory perception of sound. Located in apical part of cell. Human ortholog(s) of this gene implicated in Usher syndrome type 1D; autosomal recessive nonsyndromic deafness; autosomal recessive nonsyndromic deafness 12; and pituitary adenoma 5. Orthologous to human CDH23 (cadherin related 23). [provided by Alliance of Genome Resources, Apr 2022]