During larval development of the intertidal barnacle Fistulobalanus albicostatus, larvae in the naupliar stages I and II (NI&II) possess a single naupliar eye, and later develop additional pair of compound eyes in the naupliar VI (NVI) and cyprid stages. These eyes showed light wavelength-dependent absorbances; where the highest absorbance was within 550 to 600 nm. The phototaxis of each stage was determined under light irradiation at six wavelengths (375, 470, 515, 525, 660, and 735 nm) and at three intensities (5, 15, and 25 W/m²), except for the 735 nm treatment which was irradiated at 25, 50, and 100 lx. NI&II larvae showed no clear pattern of phototaxis under the assessed light conditions. NVI and cyprids exhibited strong positive phototaxis under the assessed light conditions, except under 375 nm at 5 and 15 W/m² where negative phototaxis was detected. Furthermore, the settlement behavior of cyprids was examined under 375 nm at the three intensities, and under the other five wavelengths at 25 W/m² or 100 lx. The highest and lowest rates of settlement occurred at 470 and 375 nm, respectively. The results provide a valuable insight into the light-response mechanisms that potentially determine the distribution of barnacle larvae.

在潮间带藤壶Fistulobalanus albicostatus的幼虫发育过程中，幼虫 I 期和 II 期 (NI&II) 的幼虫拥有一个幼虫眼，随后在幼虫期 VI (NVI) 和 cyprid 阶段发展出额外的复眼。这些眼睛显示出与光波长相关的吸光度；其中最高吸光度在 550 至 600 nm 范围内。每个阶段的趋光性在六个波长（375、470、515、525、660 和 735 nm）和三个强度（5、15 和 25 W/m ²)，除了在 25、50 和 100 lx 照射的 735 nm 处理。NI&II 幼虫在评估的光照条件下没有显示出明显的趋光性模式。NVI 和 cyprids 在评估的光照条件下表现出强烈的正趋光性，除了在 5 和 15 W/m ²的 375 nm 下检测到负趋光性。^{此外，在三种强度下在 375 nm 下以及在 25 W/m 2}或 100 lx下在其他五个波长下检查了 cyprids 的沉降行为。最高和最低沉降率分别发生在 470 和 375 nm。这些结果为了解可能决定藤壶幼虫分布的光响应机制提供了有价值的见解。