Light is an important environmental factor for the fitness of small sea urchins. It is thus important to reveal the appropriate light environments for their stock enhancement. However, the effects of light spectra on fitness related behaviors of sea urchins remain mostly unknown. To reveal appropriate light spectra for stock enhancement of the sea urchin Strongylocentrotus intermedius, we investigated the effects of light spectra on the foraging behavior, phototaxis, Aristotle's lantern reflex of S. intermedius (test diameter: 10.35 ± 0.05 mm). There were five light spectra, including red (630–670 nm), yellow (570–600 nm), green (510–550 nm), blue (440–490 nm) and white light (a mix of blue-based and a little red). We found that successful foraging proportion under blue light (65 %) was obviously higher than those under other light spectra, although no significant difference was detected (P > 0.05). The foraging time of S. intermedius was significantly higher under red light than under blue (P < 0.05) and white light (P < 0.01). Light spectra did not significantly affect the movement distance of S. intermedius (P> 0.05). Light spectra showed no significant effect on phototaxis of S. intermedius (P > 0.05). This indicates that the effect of light spectra on the foraging behavior is not due to phototaxis and movement distance in S. intermedius. Further, Aristotle's lantern reflex of S. intermedius under white light was significantly higher than that under red light (P < 0.01). In summary, S. intermedius showed significantly better foraging and feeding ability, when they were exposed to blue and white light. Since most of the spectrum is short-wavelength light (blue light) in the water below 10 m, we suggest that small S. intermedius are appropriate to be reseeded into clear water areas with the depths more than 10 m.

光照是适合小海胆的重要环境因素。因此，重要的是要揭示适当的光照环境，以提高种群数量。然而，光谱对海胆健身相关行为的影响仍然未知。为了揭示适当的光谱以增强中间层海胆的种群，我们研究了光谱对中间链球菌的觅食行为，趋光性，亚里士多德灯笼反射的影响。（测试直径：10.35±0.05mm）。有五种光谱，包括红色（630-670 nm），黄色（570-600 nm），绿色（510-550 nm），蓝色（440-490 nm）和白光（蓝光和蓝光的混合）小红）。我们发现，在蓝光下成功觅食的比例（65％）明显高于其他光谱下的觅食比例，尽管未发现显着差异（P > 0.05）。在红色光下，中间链球菌的觅食时间明显高于蓝色（P <0.05）和白色光（P <0.01）。光谱没有显着影响中间链球菌的移动距离（P > 0.05）。光谱显示没有显着影响趋光性中间链球菌（P > 0.05）。这表明光谱对觅食行为的影响不是由于中间链球菌的趋光性和移动距离引起的。此外，白光下中间链球菌的亚里斯多德的灯笼反射显着高于红光下的反射（P <0.01）。总而言之，当中间链球菌暴露于蓝光和白光下时，它们表现出明显更好的觅食和摄食能力。由于大多数光谱是10 m以下水中的短波长光（蓝光），因此我们建议将中间的小链球菌重新播种到深度超过10 m的清澈水域中。