WEBVTT

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（海洋嘅故事）

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（海膽嘅歷程︰同浮游生物交配）

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我對你嚟講應該好奇怪

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我全身都係針

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仲要我冇面

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但我已經經歷過好多種形態

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我就好似你咁，一開始都係一個卵子

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我父母從來唔知對方係邊個

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喺暴風雨前嘅一個月光皎潔嘅晚上

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成千上萬嘅海膽、蛤蜊同珊瑚

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喺海裏面釋放出上億嘅精子同卵子

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我爸爸嘅精子遇到我媽媽嘅卵子

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然後佢哋結合

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就係受精作用

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我喺一瞬間成為咗一粒灰塵咁大嘅胚胎

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漂泊幾個鐘之後

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我分裂成兩個細胞

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然後四個細胞

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然後再八個細胞

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一直分裂落去，多到數唔曬！

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一日之內我生咗腸道同骨架

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我變成咗一個好似飛船物體嘅長腕幼蟲

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我喺浮游生物當中漂浮

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搵超細嘅藻類食

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有好幾個星期我被各種幼蟲圍著

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呢啲幼蟲同佢哋長大之後嘅形貌好唔同

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生物學家要花好多時間


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先至可以辨別佢哋

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你嘗試下搵出幼蟲嘅父母係邊個？

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呢隻緣膜幼蟲會變成海螺

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呢隻幼蟲會變成海蟹

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呢個實囊幼蟲會變成水母

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有啲同我同年紀嘅朋友

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比較容易睇得到係成熟

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呢啲水母寶寶亦都叫海蜇苗

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已經同佢哋父母一樣咁靚又毒

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喺浮游生物界

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將基因傳到下一代嘅方法唔止一種

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大多數水母體有特別嘅息肉構造

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令佢哋可以經由無性繁殖繁衍下一代

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被囊動物亦都差唔多

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當食物充足嘅時候

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佢哋會複製自己成長鏈狀

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浮游生物嘅交配令人驚奇

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睇下呢啲雌雄同體嘅生物

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櫛水母同箭蟲同時

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製造、儲存同釋放精同卵子

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佢哋可以令自己
或者其他個體嘅卵子受精

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當你喺汪洋裏面漂浮

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唔知會遇到邊個時

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雌雄同體可以令你同時做兩個角色

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呢度大多數嘅物種

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唔會建立或者維持長久嘅親子關係

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呢個亦都係我父母用嘅策略

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我哋長腕幼蟲嘅數量龐大

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當其他人被獵食時

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我就藏身喺一大班人裏面自保

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唔係所有父母由得仔女自生自滅

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有啲物種仔女比較少

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但對仔女嘅照顧亦都多咗

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佢哋會花幾日，甚至幾個月

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孵化佢哋嘅寶貝

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呢種敏捷嘅橈足動物

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將佢美麗嘅卵，藏喺嘴入邊幾日

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呢類甲殼動物將佢嘅寶寶擺喺胸裏邊

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然後小心咁將佢哋
放喺身體嘅膠狀圓筒入邊

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但黑眼魷魚喺呢方面最犀利

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佢將寶寶呵護喺觸手裏面長達九個月

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同人類懷孕周期一樣長

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但最終呢啲細路都係要

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離開父母，行自己嘅路

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有啲就一世用浮游生物嘅形態生活

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有啲就同我一樣身體轉化

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當我成為胚胎嘅幾個星期之後

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我決定轉化為一隻海膽

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我嘅故事就係咁嘞

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我可能只係一個動作慢嘅、有刺嘅波

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但唔好俾我冷靜、成熟嘅外表呃咗

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我曾經係游嚟游去嘅太空飛船

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我曾經係個狂野嘅細路