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Now Playing As: Captioned (English) (change)
Horseshoe crabs are "living fossils" more closely related to spiders and scorpions than they are to crabs. They get their name from the smooth, hard shell (exoskeleton) that is shaped like a horseshoe. Part of "The Remarkable Horseshoe Crab" series.
Runtime: 1 minutes 11 seconds
The Remarkable Horseshoe Crab: Part 1
The Remarkable Horseshoe Crab: Introduction
The Remarkable Horseshoe Crab: Part 2 (Blue Blood Battles Bacteria)
The Remarkable Horseshoe Crab: Part 3 (Why Count the Crabs?)
The Remarkable Horseshoe Crab: Part 4 (Meet Maggie)
