28 - 我速度很慢還會游泳，猜猜我是誰？

歡迎登上——Riddle Island 大冒險！ 一起聽線索、猜謎語，找答案，Let’s riddle and go！ 今天，小勇士  鐘祐威 來挑戰，到底能不能完成挑戰呢？ 這集的謎題是...

I have a shell that’s hard and round,

I move quite slow along the ground.

Sometimes I swim inside the sea,

Or walk on land quite happily.

I hide inside my home so tight,

And peek out when there’s no fright!

What am I?

小朋友，你們覺得今天謎題的正確解答是什麼呢？