Where would you find a pet jellyfish?\nOptions:\n- australia\n- movie\n- japanese restaurant\n- shore\n- tank
Step-by-step reasoning process below:
tank
Freshwater jellyfish or jellyfish that lives in lakes are pet jellyfish.

There are some freshwater jellyfish species that can be put in tank as pet.

We would find a pet jellyfish in a tank.

.

So, the answer is tank