No brain, no bones, no problem: Four surprising facts about jellyfish
クラゲに関する４つの豆知識
2026.2.13
243 words
1. Jellyfish have no brains and are mostly water.
Jellyfish are not fish. They are a type of cnidarian, an animal with a soft body and stinging cells. Their body structure is very different from ours. They have no brain, heart, bones, or blood. O...
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