Mobile cacti seen in 1994's Super Metroid SNES (Super Nintendo Entertainment System) video game. Cacatacs can be found slowly scuttling about in the subterranean passages of Planet Zebes, presumably in the pursuit of water, light, and nutrients. They're not aggressive, but, if another organism gets too close, a Cacatac will begin to rapidly inflate and deflate, an action which forces some of the hundreds of needle-like structures growing from its body to eject in a projectile-like fashion, perforating the presumed threat. Naturally, due to said barbs, direct physical contact with these plants should be avoided at all costs. Like several species on Zebes, Cacatacs have evolved to take advantage of different environments (i.e., the programmers like to recycle sprites): In addition to the common green specimen found in Brinstar, a crimson-hued variant--that is especially resistant to high temperatures--can be encountered in the Norfair region, and there is also a purple version that has managed to adapt completely to the aquatic conditions in Maridia.
For comparison/informational purposes, below are some images from the Super Metroid SNES video game.
(In no particular order of importance.)
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