スミソニアン国立動物園のインスタグラム(smithsonianzoo) - 6月21日 03時05分

🌊🦀 Celebrate International Horseshoe Crab Day with these 10 fascinating facts about them! Visit our horseshoe crabs in the Bird House's Delaware Bay aviary. ✏️STORY: https://s.si.edu/3muQGFe. (Link in bio.)
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🦖 1. Horseshoe crabs predate the dinosaurs.
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🩸 2. Horseshoe crab blood is blue.
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🦵 3. They have six pairs of legs but only five are for walking.
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🥚 4. One horseshoe crab can lay about 4,000 eggs.
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🦀 5. Horseshoe crab babies look just like adults — but with translucent shells.
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🐦 6. Many shorebirds can’t survive without horseshoe crabs.
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🦂 7. They are not true crabs.
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🚑 8. You may be alive today thanks to a horseshoe crab.
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🤺 9. A horseshoe crab’s pointed tail is not for self-defense.
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🌟 10. They glow under UV light.
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Photo: A horseshoe crab on the Delaware shore at sunset.

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