How Does An Anaconda Protect Itself From Enemies?

Anacondas have no venom, They are large semi aquatic boids, meaning that they spend a lot of the time in the water, and are constrictors. They bite, unlike most snakes, from side to side, and if they get the chance, will constrict around their prey, stopping blood flow, and sometimes even breaking every bone in the victims body.

The Anaconda is one of the largest reptiles in the world. It may be that lot's of them are endangered. Anaconda's protect themselves by injecting venom or strangling the prey.
Also they camouflage with the environment around itself and defends themselves.

It injects it's venom.