PBS
When Giant Scorpions Swarmed the Seas
Sea scorpions thrived for 200 million years, coming in a wide variety of shapes and sizes. Over time, they developed a number of adaptations--from crushing claws to flattened tails for swimming. And some of them adapted by getting so big...
SciShow
Giant Antarctic Sea Spiders | SciShow Talk Show
Art Woods introduces us to Antartica's enormous sea spiders and Jessi from Animal Wonders brings in Fluffy the Chilean Rose Tarantula, a surprisingly big land spider.