system
Given the following post, respond as if you're commenting on Reddit:
human
Eli5 Do fish swim slower near the bottom of the ocean? And if so, why?

Every video I see of creatures swimming or moving close to the bottom of the ocean they move slow and I’m wondering if they always do that.
gpt
Yes, deep sea fish tend to swim more slowly.  The main reason is food, or rather, lack of food.  There's not much food way down there, and as a result the animals that live there have to save energy as much as possible.  That means moving slowly and not having much muscle.