All IALA buoys are warning or cautionary buoys.
A mooring buoy can be any shape or colour so long as it cannot be confused with an IALA buoy.
white with a crossed diamond
A cautionary buoy warns boaters of potential hazards in the water, such as shallow areas, rocks, or underwater obstructions. These buoys are typically yellow and may feature symbols or markings to indicate the specific danger. They serve as a visual alert, encouraging boaters to navigate carefully and maintain a safe distance from the hazard.
White with a Orange Circle and inside of it says, No Wake.
buoy
No a Cautionary tale is not a folktale
White buoy with blue
beach
There is no internationally agreed colour for a mooring buoy. A local chart should be consulted to find the position and use of buoys. For small water craft they tend to be made of plastic, look much like a fender and have a handle on the top.For larger vessels they are, steel, either painted black or yellow, cylindrical, horizontal, have mooring rings and have wooden fendering on them.
mooring buoy
Buoy can be a verb. Her presence would always buoy my spirits.
The correct spelling is "buoy"