Earlier this morning I was searching a lot of different threads for terrain and resource variations. In the process I saw an in-game screenshot with a sea monster swimming in the ocean. I didn't realize what I had seen until too late to remember where exactly I had seen it; I do remember it wasn't the subject of the post or thread anyway. I think it was either a resource (like the whale), or maybe a LM tile, not a unit, but I could be wrong.

Anyway, can someone please point me to where I can dl such a thing.

Is it this one? (http://forums.civfanatics.com/showthread.php?t=84800)

I think it's this thread (http://forums.civfanatics.com/showthread.php?t=79877) you're looking for. Arne made a good looking Sea Serpent resource, the last download in the first post.

Thanks for the prompt answers Virote & Wolfheart. The image I saw was Arne's resouce; the Sea Serpent is also well worth having. I've downloaded both.