While most spiders need to bite their prey to inject venom, Scytodes spiders can spit a sticky, venomous fluid that both traps its victims and poisons them – that’s why they’re called spitting spiders. Worse still, they do this in packs. After hatching, the spiderlings spend their early lives on their home web and they spit at, bite and devour prey en masse. As they grow up, their cooperative streak fades and they start turning on each other, cannibalising each other if they get the chance. (Photo by Alejandro Soffia Vega)

More: Singaporean spiders spit venomous glue, work together, eat each other