Phonosemantic compound. 虫 represents the meaning and 斗 represents the sound.
池塘里有小蝌蚪。
Chí táng lǐ yǒu xiǎo kē dǒu.
There are little tadpoles in the pond.
孩子们在看蝌蚪游泳。
Hái zi men zài kàn kē dǒu yóu yǒng.
The children are watching the tadpoles swim.
黑色的蝌蚪长出了后腿。
Hēi sè de kē dǒu zhǎng chū le hòu tuǐ.
The black tadpole has grown hind legs.
蝌蚪是青蛙的幼体阶段。
Kē dǒu shì qīng wā de yòu tǐ jiē duàn.
Tadpoles are the larval stage of frogs.
这些蝌蚪很快就会变成青蛙。
Zhè xiē kē dǒu hěn kuài jiù huì biàn chéng qīng wā.
These tadpoles will soon turn into frogs.
我们观察了蝌蚪的发育过程。
Wǒ men guān chá le kē dǒu de fā yù guò chéng.
We observed the development process of the tadpoles.
生物课上我们学习了蝌蚪的变态。
Shēng wù kè shàng wǒ men xué xí le kē dǒu de biàn tài.
In biology class, we learned about the metamorphosis of tadpoles.
在清澈的溪流中，成群的小蝌蚪摇摆着尾巴。
Zài qīng chè de xī liú zhōng, chéng qún de xiǎo kē dǒu yáo bǎi zhe wěi ba.
In the clear stream, groups of little tadpoles are swaying their tails.
Component: 斗
Component: 虫