▲帆水母被大量冲上海滩。
美国加州多处海滩出现惊奇一幕,成千上万只「帆水母」(By-the-Wind Sailor、velella
velella)被冲上岸,不幸受困甚至死亡,留下淡蓝色、宛如塑胶一般的遗体,密密麻麻地散落着。尽管这种生物对人类毒性轻微,但专家仍不建议触碰。
福斯新闻等外媒报导,4月开始,北从马林郡(Marin County)、南至圣克莱门特(San
Clemente)的海滩,都可以看见大量「帆水母」的踪迹。研究人员认为,它们最近大量搁浅、被冲上岸,可能与加州外海海水较温暖,导致风速增加有关。
美国国家公园管理局(NPS)下辖的雷斯岬国家海岸公园(Point Reyes National
Seashore)发文解释,「在春天与初夏的月份,雷斯岬海滩游客可能遇到成千上万的帆水母受困沙滩上。这些蓝色水母状的生物,利用半透明、三角形的帆板,在海洋自由漂浮。」
不过,由于「航行路线由盛行风向决定,对于这些小水手而言,微风的变化可能成为坏消息,如果风向不对、风刮得太大,就可能被吹到岸上,并且死亡」,如果未被浪潮带回海里,就会在原地留下塑胶一般的帆板与浮囊。
帆水母透过有刺触手,捕捉浮游生物为食,其触手对于人类来说毒性较低,但仍不建议触摸。生物学家丝威特(Liz
Sweet)表示,如果在海滩上遇到帆水母,很欢迎过去看一看,但仍要小心谨慎,「虽然只是轻微刺痛,但你不知道自己是否会过敏。所以,我的建议是只看不碰,并且不要让你的狗狗吃掉它们。」
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