How big is the global personal aquarium market?

The global wholesale trade in marine species for aquaria amounts to $200-330 million and includes fish, corals, sponges, anemones, molluscs, crustaceans and live rock. The annual, global marine ornamental fish trade is estimated to be 40 million specimens. read more

For aquarium keeping, they estimate that there are a little over 12 million households who keep freshwater fish and a little over 1 million that keep marine fish. Of course, there is going to be overlap with households that keep both, so a rough estimate would be somewhere around 13 million households. read more