Iguana
It sounds like you are describing a red-headed agama lizard. This lizard is known for its bright red or pink head and neck, as well as its dragon-like appearance with spiky scales and a crest along its back. Red-headed agamas are native to parts of Africa and are popular pets in the reptile trade.
It is called its crest.
A rooster's crest is the fleshy, red comb on top of its head. It is used for attracting mates and regulating body temperature. The size and shape of the crest can vary depending on the rooster's breed.
The crest on a horse refers to the ridge of muscle and fat along the top of the neck, just behind the mane. It can vary in size depending on the horse's breed, fitness level, and overall condition. A well-developed crest is often a desired trait in certain disciplines like driving or dressage.
Reproductive organs of both male and female chickens is called the Cloaca.
Iguana
The medial ridges along the sacrum are called the sacral crest. It is a series of tubercles that represent the processes of the sacral vertebrae.
The upper ridge of the ilium is called the iliac crest. It is a prominent bony structure located at the very top of the hip bone and can be felt along the waistline.
Crest.
Iguana - only option that fits
The crest.
The crest of a hill is called the summit or peak.
In a wave, it is called the wave length.
It sounds like you are describing a red-headed agama lizard. This lizard is known for its bright red or pink head and neck, as well as its dragon-like appearance with spiky scales and a crest along its back. Red-headed agamas are native to parts of Africa and are popular pets in the reptile trade.
The distance from crest to crest in a wave is called the wavelength.
The distance from the crest of one wave to the crest of the next wave is called the wavelength. It is typically measured from crest to crest or trough to trough.
Crest :)