Let's look at the sentence you wrote:
"The ocean hide inside a whole world of mysterious creatures. But ocean water is salty, and animals have their special ways to live there."
Here's how to fix the grammar step-by-step:
- "The ocean hide" should be "The ocean hides" because "ocean" is singular, so the verb needs an "s" at the end.
- "hide inside a whole world of mysterious creatures" is a bit unclear. It sounds like the ocean is hiding, but you probably mean that the ocean contains or holds a whole world of mysterious creatures.
- So, a better way is: "The ocean hides a whole world of mysterious creatures."
- The rest of the sentence is good: "But ocean water is salty, and animals have their special ways to live there."
Putting it all together, a corrected sentence would be:
"The ocean hides a whole world of mysterious creatures. But ocean water is salty, and animals have their special ways to live there."
This now sounds clear and grammatically correct!