Some older/less efficient worker termites will develop 'backpacks' of toxic chemicals that explode when the termite is threatened. They are essentially used as suicide bombers when the colony is being attacked.
8
In Australia, there are spiders big enough to eat snakes.
20
Jumping fleas can accelerate 50 times faster than the space shuttle.
218
There's a phone app called RoboRoach that allows you to remotely control a cockroach through a chip that you to manually implant into the unwitting critter.
10
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
The Lion's Mane Jellyfish is the largest jellyfish in the world. They have been swimming in arctic waters since before the dinosaurs (over 650 million years ago).
12
A scorpion can hold its breath for up to 6 days.
19