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森林小科学家 | 小寄居蟹的“二手房” (寄居蟹为什么换房?)

  • 2026-08-06 11:37:39
森林小科学家 | 小寄居蟹的“二手房” (寄居蟹为什么换房?)
Hi~欢迎来到森林小科学家。每周分享温柔小故事,陪孩子轻松懂科学、养品格。(亲子共读让孩子爱上阅读)
夏天的沙滩上,小刺猬球球看到一个会走路的“海螺壳”——壳里伸出了两只小钳子和一对黑黑的眼睛,正在沙子上爬。
“跳跳!这个海螺长腿了!”球球惊讶地喊。
小松鼠跳跳跑过来一看:“这不是海螺,是寄居蟹。它找了一个空海螺壳当房子住。”
球球蹲下来仔细看——果然,一只小螃蟹住在海螺壳里,只露出脑袋和钳子。看到球球,它缩回壳里,只剩两只眼睛在外面。
“它为什么要住别人的壳呀?自己没有壳吗?”球球问。
跳跳说:“寄居蟹的腹部是软软的,没有硬壳保护。它必须找一个空海螺壳做房子,保护自己。而且随着它慢慢长大,还要不停换更大的‘房子’——就像你长大要换新衣服一样。”
球球好奇地问:“那它去哪里找新房子呀?”
跳跳说:“它去海滩上找新的空海螺壳。有时候还会和别的寄居蟹‘交换房子’——大的换大壳,小的换小壳,像开二手家具交易会!”
球球笑了:“哈哈,寄居蟹是‘二手房’交易专家!”

跳跳小发现

小朋友们你知道吗?寄居蟹有1000多种,有的生活在海里,有的生活在陆地上。寄居蟹搬家的时候非常认真——它会先检查新壳的大小、重量、有没有裂缝,确保合适了才搬进去。寄居蟹的钳子一大一小,大钳子用来堵住壳口当门,小钳子用来吃东西。寄居蟹的寿命可以活到10-30岁呢!这个知识你没想到吧!
球球在沙滩上找到了一个空的海螺壳,轻轻地放在寄居蟹旁边。
“小寄居蟹,这个壳送给你当备用‘房子’。等你长大了可以换它。”
跳跳笑了:“你是个善良的小刺猬。”
寄居蟹伸出钳子碰了碰那个新壳,好像在说:谢谢!然后继续拖着它的小房子往前爬。
球球对着寄居蟹挥挥爪子:“小寄居蟹,祝你找到最合适的‘大房子’!”
小朋友们,下次去海边,记得找找这些会走路的‘海螺壳’。你觉得寄居蟹更喜欢螺旋纹的房子,还是光滑的房子呢?评论区告诉我吧!
🌙 每周分享亲子科普小故事
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  1. CONNECT:[ UseTime:0.000992s ] mysql:host=127.0.0.1;port=3306;dbname=a_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001613s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000741s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000612s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001362s ]
  6. SELECT * FROM `set` [ RunTime:0.006158s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001571s ]
  8. SELECT * FROM `article` WHERE `id` = 552480 LIMIT 1 [ RunTime:0.001006s ]
  9. UPDATE `article` SET `lasttime` = 1786420749 WHERE `id` = 552480 [ RunTime:0.014696s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.009826s ]
  11. SELECT * FROM `article` WHERE `id` < 552480 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001191s ]
  12. SELECT * FROM `article` WHERE `id` > 552480 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001372s ]
  13. SELECT * FROM `article` WHERE `id` < 552480 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.009033s ]
  14. SELECT * FROM `article` WHERE `id` < 552480 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.009022s ]
  15. SELECT * FROM `article` WHERE `id` < 552480 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.050197s ]
0.289826s