Living fossils
seen from China

seen from Malaysia
seen from Türkiye

seen from United States

seen from United Kingdom

seen from United Kingdom
seen from United States

seen from Germany

seen from United States

seen from Germany
seen from Russia

seen from Germany
seen from Australia

seen from United States
seen from Malta
seen from China
seen from Canada
seen from Malaysia
seen from Türkiye
seen from China
Living fossils
Horseshoe crabs are an incredibly old and successful group of arthropods. And they're adorable too.
Pareidolia
Limulidae signs
Limulus polyphemus species variant notes (Cape Falmouth’s “Burgonet” and ———)
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Limulus polyphemus species Cape Falmouth variant notes (szyzak and dragoon) Cape Falmouth's (recorded) species of horseshoe crabs (part 1)
Horseshoe crabs! These are extremely ancient organisms, evolving in the Ordovician and still swimming around to this day.