usually just air or sometimes there might be a little ball that lights up
a green spotted puffer fish egg looks like a fuzzy ball
When the puffer fish inflates its body to increase its size it is a behavior called a defense mechanism. Puffer fish have highly elastic stomachs and the ability to quickly take in air or water to puff themselves up. This turns them into an inedible ball.
A puffer fish usually puffs up and looks like a ball with spikes that was when its pray tries to eat it it will poke them and eventually leave them alone.
so its spikes come out to protect it from anything that tries to eat it
they puff up like a ball with spikes. It looks something like sea urchin when it puffs up.
A solid metal ball would sink into the very viscous liquid, a hollow metal ball would float. The speed of descent is dependent on the density of the liquid.
The liquid inside a density ball is usually a mixture of different liquids with varying densities, such as water, glycerin, or colored oils. The different densities of these liquids allow the ball to float at different levels when placed in a liquid.
Good choices would be a pea puffer, spotted puffer, or a figure 8 puffer
Yes just subtract the volume of the ball from the volume you measure of the liquid.
It floats.
puffer fish are ugly