DJ Bonebraker
a.k.a Laura
The Last Conformist said:The granddaddy of all arachnids, surely, were the great Paleozoic sea scorpions, the largest of which reached lengths of 2m (6'7").
I was talking about the Living ones
.... But that gives me an idea for an Arachnid Naval unit: the Horseshoe Crab (the direct descendants of said Paleozoic Sea Scorpions).... Also larger than any of thier land-based cousins, but not as big as their forbearers.