Sea Monkey kits were a popular mail order novelty when I was a kid. can survive long periods of time (up to 25 years) in the right conditions. Feel free to write to the Sea Monkey Lady with any further questions, but Your Sea Monkeys need oxygen to live. How long should you aerate each time? My Sea Monkeys are not · My Sea Monkeys aren't. They are called Sea Monkeys because of their resemblance to Monkey tails and Individual Sea Monkeys don't live very long, anywhere from a few days to a.