This is a fascinating video of a Velvet Worm and shows how it attacks a beetle. Strange. Very strange.
Velvet worms are worm-like, segmented creatures with a flattened cylindrical body cross-section and rows of unstructured body appendages known as stub feet. The animals grow to between 0.5 and 20 cm, with the average being about 5 cm, and have between 13 and 43 pairs of legs. Their skin consists of numerous, fine transverse rings and is often inconspicuously colored orange, red or brown, but sometimes also bright green, blue, gold or white and occasionally patterned with other colors.
Potential victims are sought out with the aid of the antennae and pursued into the smallest crevices. While smaller prey are killed immediately, larger animals are first immobilized using a white, protein-rich, glue-like liquid produced by the two slime glands. This is squirted from the pores of the oral papillae over a distance of up to 30 centimeters and hardens very quickly when exposed to the air, so that the prey becomes caught in the sticky substance. This substance does not adhere to the water-repellent skin of the velvet worm, which can therefore safely approach its victim. The prey is now killed and pre-digested by the injection of toxic saliva. The sharp jaws cut the food into fine pieces before it enters the digestive tract via the mouth.