system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Do jellyfish ever get their tentacles(?) tangled? If so, do they die? How do they get unknotted?
gpt
Think of sally who has the longest hair in class. When sally goes underwater, does her hair become tangled as she shifts directions in water? They don't because of how inertia works in water. Each strand of hair flows uniformly in the same direction.

Lets say hypothetically they get attacked by some bored dolphin and it decides to leave after trying to eat one. The inertia from the water will naturally flow between the strands and they will eventually untangle. If it dies, it's because the dolphin ate that thing whole.