I am an annimal
I live in water.
I look like a snake.
I m very slippery.
Snail
It is right
Based on the information provided, you are likely describing an aquatic animal that resembles a snake and is known for being slippery. To determine the specific animal, we can think about characteristics of such creatures. One prime example that matches these descriptions is an eel.
Eels are elongated fish-like creatures that have adapted to living in water. They have a snake-like appearance due to their slim, elongated bodies. Eels possess a slippery outer layer of mucus that helps them glide through water with ease. With their flexible bodies and ability to move undetected, they are known for being particularly slippery. Therefore, it seems likely that you are an eel.