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.
Nickels with a clear D mint mark are worth $3 in worn condition, $4 if almost like new, and around $10 if uncirculated. Nickels where the recut S shows underneath the D mint mark are worth $6 to $30 depending on condition.hese are more difficult to find and  are worth $5 or so even in very worn condition. The value of any  coin is based on rarity and condition. A 1938 D Buffalo in  especially nice, uncirculated condition can be worth over $250.