The creature you see above is a spider that can actually surf on top of waves and hunt for a wide variety of animals including not only insects but also fish and toads. Dubbed the Dolomedes briangreenei, this species of spider floats on top of water and senses vibrations below to detect potential prey. The spider can even submerge itself underwater for up to an hour to hunt down prey, which makes it doubly frightening for any creatures caught in its path. The largest animals that the spider has been known to eat are cane toads, which can measure up to nine inches in length. For comparison, the D. briangreenei is about the size of a human palm. ...

This spider is the size of a PUPPY, and its legs are a foot (0.3 metres) long.

Meet the green jumping spider (Mopsus mormon), Australia’s largest—and perhaps cutest—jumping arachnid. These spiders hunt in the day time, moving fast to attack their prey, and camouflaging against green leaves. If you see one, leave it alone. Although their bite won’t kill you, it’s extremely painful.

Collected from the Ross Sea shelf in southern Antarctica, this 9.8-inch-long (25-centimeter-long) giant sea spider was one of 30,000 animals found during a 35-day census in early 2008. The marine arachnids, which prey on hydroids and bryzoans - branching, coral-like animals - are larger and more common in Antarctic waters than anywhere else on Earth. Cold temperatures, few predators, and high levels of oxygen in seawater could explain their gargantuan size.

Found in the deserts of Morocco, the cartwheeling spider (cebrennus rechenbergi) uses all eight of its legs to cartwheel and roll away from predators. Using forward or backward flips, this movement effectively doubles its normal walking speed similar to acrobatic flic-flac movements used by gymnasts. Interestingly, C. rechenbergi is the only spider known to use this unique form of rolling locomotion!

Did you know one quart of horseshoe crab blood costs $15,000 dollars?

The critter's blue blood is a sort of bacteria killing machine that clots around ‘invaders’, eliminating them and protecting horseshoe crabs from lethal infections. Researchers have been harnessing the power of this blue blood to test medical supplies for contamination.

This gorgeous creature is Typhochlaena costae, a species of spider recently discovered in Brazil.