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.
There are not a lot of rare nickels and they are fairly inexpensive, which makes them a great coin series for the beginner or those with a modest budget to collect. You can put together a nice collection without spending a lot of money. In fact, a lot of the Jefferson Nickel series can still be found in circulation. Who knows, you might even happen across a very unique rare nickel just like Mr. Ken Frith did. In 1961, knowing that Mr. Frith specialized in error coins, a very unique 1942-S Jefferson Nickel was brought to his attention.