All blank have moveable spines that they use for protection.
sea urchins
sea cucumbers
...
![subject](/tpl/images/cats/biologiya.png)
Biology, 25.01.2021 20:40 eddiewoods1935
All blank have moveable spines that they use for protection.
sea urchins
sea cucumbers
sea stars
brittle stars
![ansver](/tpl/images/cats/User.png)
Answers: 3
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