Sea Cucumbers
Sea cucumbers are nothing like their vegetable counterparts, and any predator that wants to try to take a bite is in for a big surprise. The sea creature barely moves, so they are often vulnerable to predators, but the cucumbers are toxic.
Some sea cucumbers have developed the ability to expel a part of their respiratory from an unsuspected place – its anus. This distracts any threatening enemy, allowing the cucumbers to tangle them up and initiate an accompanying toxin. Organs can grow back in a few weeks, so the cucumbers can continue to throw their never-ending supply of toxic body parts at anything that dares to threaten them.