Are there any animals that don't see colors at all?

Question

If so then what do they see? If you say black and white, aren't these colors aswell?

Answer 1

"Shades of grey" is a better term.
Many nocturnal animal see in greyscale, it is more sensitive than colour sight, because the photons required to activate a rod (greyscale light sensitive nerve ending in the retina) is less than is required for a cone (colour sensitive nerve ending). Also, many animals, particularly if they are preyed upon by others, have lost their colour site, because having just greyscale gives them an advantage in seeing movement around them - people who are totally colour blind are much better at spotting camouflaged soldiers, for instance.

Turn down the colour on you TV set, and this will give you a rough idea of what they see. Sometimes the colours may be only partly absent, they may not see red correctly etc, but this varies according to the animals needs.

One way to assess roughly whether an animal is colour blind is to see, in the wild, whether they are colourful or not. If they are generally just a dull brown/grey colour (both male and female) then they are generally clourblind to a degree. If they are brightly coloured, then colour is important, say, in picking a mate, so they are generally not colourblind. Exceptions are domestic animals, which have been artificially bred for colour etc.
Of note, cattle are colour blind (Bulls cannot see the colour of the red flag of the matador). So are dogs.