Demon & Nautilus
Spot is WIS. No, you don't see a shark out there. You do see a few other things of interest though.
Far off, you see an undersea domed building at the end of the glass hall. Looks like you can't get there without going past the giant demon. Also, it looks like off to the left, there's a drop-off into a sea trench. You see the ruined mast of a sunken ship sticking out from the top. A barnacle-encrusted dragon emblem is at the very top of the mast. That's a good 30 meters off.
Close by, however, you think you see why there's all these nautilus emblems. Floating right near the wall, hovering about five feet above the seafloor, is a live giant chambered nautilus. The thing is huge, about ten feet diameter. Tentacles and two large eyes, each about the size of beachballs, stick out from the end of the shell, staring at you through the thick glass.
...
"Hah hah," laughs the demon. "Whoa there, I almost got you that time, huh? Yeaaah... I almost got you there. Good one." He bends over and picks up his ball, bouncing it off a wall and catching it absent-mindedly.
"Well I've been here a bit. Not too long, not like '
for a thousand years' or anything. Maybe..." the demon counts on his fingers. "Oh, about a week. Right about when all those fruity weathermen took off. See, I'm supposed to guard this undersea dome, which from the looks of you guys, is a bit over your heads. There's a crazed golem in there. Think you can take a crazed golem? No? Yeah, that's what I thought, no offense. Or, rather, you should take offense? But it's just because I'm a demon, alignment: asshole, and all that."
"So what's your deal? You're not weathermen. This place all go to hell? Ha ha!
'Go to hell', get it? You know, 'cause I'm a demon? That's pretty funny."