Enjoy-Able-Ish!
Well, 1st of all, just by looking at the amazing water effects, i can say this took its time. So, nice graphics!
I have a little issue with the 'tweened' movements on the characters, maybe you could work it a little more (maybe using more frames, or something like that).
About the gag itself, i found it unexpected and original, giving some kind of 'personality' to this Leviathan-Guy!