<Tr> <Td> Chinese alligator </Td> <Td> 100--200 </Td> <Td> Only in the wild . Chinese alligators are quite prolific in captivity, with estimates of the total captive population at over 10,000 animals, mostly in the Anhui Research Centre of Chinese Alligator Reproduction and the Madras Crocodile Bank . </Td> </Tr> <Tr> <Td> Komodo dragon </Td> <Td> 4,000--5,000 </Td> <Td> Their populations are restricted to the islands of Gili Motang (100), Gili Dasami (100), Rinca (1,300), Komodo (1,700), and Flores (perhaps 2,000). However, there are concerns that there may presently be only 350 breeding females . </Td> </Tr> <P> There are an estimated 3,500,000,000,000 (3.5 trillion) fish in the ocean . In the last 100 years, the number of small fish--such as pilchards, herrings, anchovies, sprats and sardines--has more than doubled . It is caused by a major decline in big' predator fish' such as sharks, tuna and cod due to over-fishing . </P> <P> Recent figures indicate that there are more than 1.4 billion insects for each human on the planet An article in The New York Times claimed that the world holds 300 pounds of insects for every pound of humans . Ants have colonised almost every landmass on Earth . Their population is estimated as 10--10 billion . </P>

What animal has the biggest population on earth