they position upsidedown and spin around while mating.
I would leave them alone. They get a little "wild" while mating.
Not really. While there are reptiles that can change color, none of them live in the ocean.
it becomes black(change in color), change in size
yes,while mating the male leech sucks the females blood.
After mating they might attack sometimes even to death.
Sorry, I don't think you can be a loner while mating? Doesn't it defeat the purpose?
Males court hens by puffing out their feathers, dragging their wings, and spreading their tails. The male's head will change color as well depending on how excited he is with white showing the most excitement. Males also gobble, spit, and drum to attract females.
The leaves lose their chlorophyll, leaving the underlying color. Yellow is the color of carotene, while red is because of the sugar content.
hamsters eat hamburgers whilst also taking a bath and mating
I like to watch the clouds change color while the sun is setting.
Any kind of meat will change color while it is cooking. No matter what type of cooking method you are using.