We have mosquito fish available every year! They are live bearers (like guppies) and are very effective in consuming mosquito larvae (as many as 100 per day). They are considered to be the most effective non-insecticidal and non-chemical method of controlling mosquitoes. They live 2-3 years and grow to a maxium size of 3 inches. They do not require a special environment and can tolerate a wide range of temperatures. They are extremely entertaining and are compatible with both goldfish and koi.