Box jellyfish occur near beaches and near river estuaries from October to April north of 1770. They can occasionally be found outside these times. Here is the same text in Chinese (Simplified):
箱型水母会在每年十月到次年四月间出现在 1770 镇的海滩和河口附近。偶尔也能在其他时间点发现它们的身影。