HORSESHOE CRAB BIOLOGY QUIZ How much do you know? Click on to move on or see answer. Presented by Dr. Nancy Targett and students N. Lopanik

Where do horseshoe crabs live? A. The ocean C. Volcanoes D. The sky B. In trees

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Is this horseshoe crab young or old? A. Young B. Old

You can tell this horseshoe crab is old because it has lots of slipper shells, and encrusting animals on it, meaning that it hasn’t molted recently. Horseshoe crabs molt every year while they’re growing. Next question

How can you tell if a horseshoe crab is a male or female? A. Number of eyes B. Shape of first legs D. Ask itC. Color

B. Shape of first legs This boxing- glove shaped leg belongs to a male horseshoe crab. This thinner- shaped leg belongs to a female horseshoe crab. Next question

To which animals are horseshoe crabs most closely related? A. LobstersB. Clams D. SnailsC. Spiders

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Identify this... Click for answers

Next question Identify this... Walking legs for moving along the bay bottom Mouth for eating clams, worms, and other food Book Gills for breathing

What do horseshoe crabs eat? A. Clams and Worms B. Grass D. TreesC. Algae

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Where is the center of horseshoe crab breeding on the East coast? A. Chesapeake Bay C. Delaware Bay D. Long Island Sound B. Raritan Bay

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What is this? Click for answer

Next question What is this? The Telson The horseshoe crab’s tail is NOT a stinger or poisonous. It is used for steering and as a lever to flip the animal upright when it has been overturned. Never pick up a horseshoe crab by the tail because you could break it!

Where do horseshoe crabs lay their eggs? A. In the grassB. In the water D. On the shell of the male C. In the sand

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As birds migrate north for the summer through the Eastern flyway, how many horseshoe crab eggs do they eat in 2-3 weeks? A. Half their body weight B. One-third their body weight D. Five times their body weight C. Twice their body weight

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How old do horseshoe crabs have to be before they can reproduce? A. 2-3 years old B. 5-6 years old D years old C years old

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What use does the product, Limulus amoebocyte lysate (LAL) have for people? A. Testing pharmaceuticals B. Vaccine D. Aquaculture of shrimp C. Dietary supplement

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Horseshoe crab blood is blue: what metal makes it that color? A. IronB. Copper D. Aluminum C. Tin

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What should you do if you see a horseshoe crab stuck on its back on the beach? A. Turn it overB. Turn it over D. Turn it over C. Turn it over

Next Horseshoe crabs sometimes get turned over on the beach, and use their tail (telson) to right themselves. But sometimes their tail is broken and they have a hard time turning over. So if you see one struggling, give it a nudge!

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