Why is visualization not sufficient to properly identify bacteria?

Visualization is not sufficient to identify bacteria properly because bacteria have a limited set of shapes and many unrelated bacteria may share the same shape. Therefore, bacteria biochemical tests are mainly used to identify unknown bacteria. The type of biochemical reaction each bacteria undergoes act as a thumbprint for its identification.

What some science videos to you

In some developing nations the percentage of the animal protein from fish in the diet can be as high as 25 percent.  about 85% of fish caught is used for human consumption.  the remainder is converted into fishmeal and fish oil.