Intensity can also be considered as the brightness or dullness of a color. Intensity is adjusted by adding additional colors to the pure hue. A color can be made less intense by adding gray to the color. In some ways, intensity can be measured by the amount of gray in the hue.
Making the world better, one answer at a time. The rocks in a drum fish head are a sort of over developed hearing aid. They are called otoliths, and are actually a bone formation, and are similar to the inside of oyster shells or freshwater muscles. Both freshwater and saltwater varieties of the drum have these, and were used in olden times as jewelry or good luck charms.
Limestone rock for Aquarium. Hello Everyone, I recently purchased several holey Limestone rocks from someone on CraigsList to be used in my next aquarium project (African Cichlids). The rocks were originally purchased at an aquarium store and were used in a fish tank before I got them. The rocks are pictured below... As you can see, some of them have some algae on them. I would like to clean them before I put them in my tank.