no...... but they are very poisonous, the poison works very fast and can kill you in minutes....
YOU
silver
no it does not change its colour
it acts like a stone
They are about 99% of the time orange with white stripes.
Yes only if there is no filtration or a bubble stone for air
No they can not change colors
it's an octomal color normally brown but as you can see it might be yellow
Once a week.
The Phosphorus change colors is Chameleons.
Yes, most freshwater fish need a air stone in their tank. And even if they don't need one it will improve the fishes health.
By using an air stone or a filter that adds oxygen to the water.