How many cryptocurrency mining pools are there?

With the booming popularity of cryptocurrencies, the question of "How many cryptocurrency mining pools are there?" has become increasingly pertinent. Mining pools, essentially collaborations between miners, aim to increase the chances of finding a block and earning the associated reward. Given the dynamic nature of the cryptocurrency landscape, it's difficult to provide an exact number, as new pools are formed and others may dissolve. However, one can expect a wide range of pools, catering to different cryptocurrencies and mining algorithms, existing at any given time. These pools vary in size, ranging from small, specialized groups to large, established entities.