Use One Focal Wall
Choose the wall visible from the doorway.
A single ocean scene creates more impact than small unrelated decals on every wall.
Select One Large Animal
Use a whale, turtle, or octopus as the main feature.
Add only a few smaller animals around it.
Use Smaller Details Higher
Place bubbles, small fish, and stars in the upper section.
Keep larger sea plants and animals lower to create depth.
Choose Light Colors
Soft blue, white, pale aqua, and gray can keep the room visually open.
Use navy and dark colors as small accents.
Keep Furniture Simple
White and pale wood furniture work well in compact rooms.
Avoid heavy marine-patterned bedding and curtains when the wall is already detailed.
Limit Filler Pieces
Do not use every bubble and fish from the set.
Visible wall between pieces helps the scene feel larger and less crowded.
Conclusion
Create depth in a small room with one focal wall, one main animal, layered details, and light colors. Open wall space is more effective than covering every surface.