2.2 Animals
Considering that the potentially gender-specific CPL-reflection ability of mantis shrimps, the present study only focused on male O. oratoria . A total of 150 male O. oratoria s (average weight: 26.45 ± 3.11g; average length: 125.39 ± 6.15 mm) were collected in May to June 2022 from Yantai Yangma Island, China. The collected O. oratoria s were transported back to the laboratory using an incubator filled with seawater. All O. oratoria s underwent 30 days of temporary rearing in natural seawater and then were used for morphological characterization and subsequent light exposure experiments.