In fish, vision may be impaired when eye tissue is in direct contact with environmental conditions that limit aerobic ATP production. We hypothesized that the visual acuity of fishes exposed to hydrogen sulfide (H₂S)-rich water would be altered owing to changes in cytochrome c oxidase (COX) activity. Using the H₂S-tolerant mangrove rivulus (Kryptolebias marmoratus), we showed that a 10 min exposure to greater than or equal to 200 µM of H₂S impaired visual acuity and COX activity in the eye. Visual acuity and COX activity were restored in fish allowed to recover in H₂S-free water for up to 1 h. Since K. marmoratus are found in mangrove pools with H₂S concentrations exceeding 1000 µM, visual impairment may impact predator avoidance, navigation and foraging behaviour in the wild.

在鱼类中，当眼组织与限制有氧 ATP 产生的环境条件直接接触时，视力可能会受损。_{我们假设暴露于富含硫化氢 (H 2} S) 的水中的鱼类的视力会因细胞色素 c 氧化酶 (COX) 活性的变化而改变。使用耐H _{2 S 的红树林河 (} Kryptolebias marmoratus )，我们发现 10 分钟暴露于大于或等于 200 µM 的 H ₂ S 会损害眼睛的视力和 COX 活性。_{在允许在无 H 2} S 水中恢复长达 1 小时的鱼中恢复视力和 COX 活性。由于在红树林池中发现了K. marmoratus ，H ₂S 浓度超过 1000 µM，视力障碍可能会影响野外捕食者的回避、导航和觅食行为。