Secret of the evil water monster

[CplShep]

I think they did actually have an idea for a water model monster but scrapped it somewhere along the line and went with the Invisible Ball of Pain.

Spoiler below!

I'm basing my theory on this picture that's called old_fish01. It's located in the super_secret folder and it looks like it may have been a design for the water monster that never really got past the concept stage. I could also be wrong and it's actually just a random monster. We may never know.