The Xmas Float Lizard is an enemy from Jazz Jackrabbit 2: The Secret Files, Holiday Hare 98 and Christmas Chronicles. It is also a JCS event in the games listed. Note that this enemy/event is not present in the original Jazz Jackrabbit 2.
This enemy behaves exactly as a normal Float Lizard, with its flying behaviour and the amount of damage it can take being the same. The only differences are visual ones: a red Santa-hat is worn on the Xmas Lizard’s head and it drops exploding presents (possibly gift-wrapped bombs) rather than normal, plain black bombs.
Most information about the normal Float Lizard is also relevant to the Xmas Float Lizard, so consult the Float Lizard’s main wiki-entry when it has been created.
Eat your lima beans, Johnny.