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.
In all, 1944 steel cents are fewer in number than their 1943 copper counterparts, and are even more valuable; one such example minted in San Francisco sold for $373,750 in an August 2008 auction held by Heritage Auctions; this was the highest auction price ever for a Lincoln cent until September 23, 2010, when it was superseded by a 1943-D bronze penny.