Photosynthesis in the Ocean
Science

Contains organisms that can severely lower oxygen levels in natural waters
Harmful algal bloom
Contains organisms that can severely lower oxygen levels in natural waters. Harmful algal bloom. A harmful algal bloom is a rapid increase of algae in water, which can produce toxins and deplete oxygen, harming aquatic life.

A colored chemical compound that absorbs some colors of light and reflects others
Pigment
A colored chemical compound that absorbs some colors of light and reflects others. Pigment. In simple terms, a pigment is a substance that gives color to other materials by absorbing some wavelengths of light and reflecting others.