Colored, toned or muted palette
Poor contrast or values
Smudged, indistinct lines
Overly simple or cartoonish
Visible borders or frames
Large empty spaces without detail
Wrong proportions or scale
Non-reef environments
Surface elements like boats
Non-native species to Palau
Unhealthy or damaged coral
Blurry or obscured detail
Overcrowded composition
Stylized or abstract art style