As a child I received some Sea Monkeys as a gift, after growing them for a couple of days I started to notice the number of individuals shrinking and the remaining Sea Monkeys growing quite large, eventually I was left with just one &quot;Sea Monkey&quot; that was almost an inch long. Turns out I&#x27;d been given Triops, cannibalistic crustaceans, not cute little harmless Sea Monkeys. <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Triops_longicaudatus" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Triops_longicaudatus</a>