Fig. 4. Compromised hair cell development eya4 morphant fish. (A) At 72 hpf the ampulla of the posterior cristae of wild-type fish (n=10) have delicate hair cell stereocilia (stained with FITC-labeled phalloidin) that appear as spikes. (B) Stereocilia in hair cells of eya4 morphant fish (n=12) are dysmorphic and reduced in number.