Nervous system and muscles in sea urchin larvae: Green indicates the entire larval nervous system. Magenta marks the muscles of the digestive tract. Tsukuba, Japan—A cluster of non-visual, ...
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Can a sea urchin sting kill you?
With their pointy spines, sea urchins are not warm and fuzzy marine animals that people want to snuggle up to. While they are an essential part of the ocean’s ecosystem, they can puncture a person’s ...
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