Didinium is a voracious hunter of live food, namely Paramecium. It is found quite commonly in freshwater habitats such as ponds and other still waters. It is in constant motion, swimming around in search of prey.
1938 S Jefferson Nickel. CoinTrackers.com has estimated the 1938 S Jefferson Nickel value at an average of $3, one in certified mint state (MS+) could be worth $50.(see details)...umismatic Value: $3 to $50.00. Value: As a rough estimate of this coins value you can assume this coin in average condition will be valued at somewhere around $3, while one in certified mint state (MS+) condition could bring as much as $50 at auction.
When the U.S. Mint began production of the Jefferson Nickel, the coin was produced at three separate facilities: Philadelphia, Denver and San Francisco. More than 30 million Jefferson Nickels were struck in 1938 and they were released into circulation on November 15 th of that year. According to some accounts, the Jefferson Nickel was widely hoarded when it was first released. It is said that the coin was not widely seen in circulation until 1940, almost two years after it was first produced.