The usual way to stop crouching in Marine Academy Roblox is to press the same crouch key again, or use the game’s crouch toggle if it has one. In similar Roblox crouch systems, players often report that C is the crouch key, and turning off UI Navigation in Roblox settings can also fix input issues if crouch isn’t responding.

What to try

  • Press C again to uncrouch.
  • If that does nothing, check the game’s controls menu for a crouch toggle or reset option.
  • In Roblox settings, turn UI Navigation off, then try crouching again.
  • If you are in a lobby or safe zone, the game may disable crouching there.

If you mean scripting

For a Roblox dev setting, the common fix is to track crouch state with a boolean and stop the crouch animation when the key is pressed again, instead of relying only on key release. Another approach is to stop the crouch track directly and restore normal movement/animations when crouch ends.

Quick note

I couldn’t verify a Marine Academy-specific control guide from the available results, so the safest answer is the general Roblox crouch fix above.