海洋小牙医：清洁濑鱼如何帮助大鱼
In warm ocean water, near colorful coral reefs, you can find a small fish. It is called the cleaner wrasse. The fish is only as long as your finger. It has bright blue and yellow stripes on its body.
The cleaner wrasse has a special job. It eats tiny bugs from the skin of bigger fish. These bugs are called parasites. The wrasse also cleans inside the big fish's mouth. It is like a tiny doctor for fish!
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