@AIDS Kitten  
What? It’s just a gap in two rocks…facepalms

Wonder what it would be like if Percy Jackson was here…
 
 
@Amethyst_Crystal  
I agree. There’s now some male blue pegasus in G4 named North Star that’s not related to G1 North Star, IMO the latter is better.

@Dogman15  
It means the old G1 seapony character too.  
There are many names that are cross generation.

Sunshower? What does that tag mean here, if not the new Season 5 pegasus character?

all this talk of deep ones is making me think the x-com boys paid the seaponies a visit and accidentally a Cyberdisc in their vicinity.

@Amethyst_Crystal  
I wouldn’t know; I don’t spend a lot of time in ocean caves.

@Background Pony  
@AIDS Kitten  
@TexasUberAlles  
It looks even more like an average natural ocean cave.

@Amethyst_Crystal  
Wow, I can’t believe I didn’t notice that in the first place…  
Welp.  

@Tenafly Viper  
You don’t, the seaponies are pushing them.

@Background Pony Number 17  
So… The adult sea ponies grew to beyond the point wherein they could masquerade as mortal beings?

@Background Pony Number 17  
…okay, that is fucking hilarious and awesome at the same time.

Most fanon I’ve read suggest the Sea Ponies ARE the Deep Ones.

@Tenafly Viper  
Them, yeah. A bunch of fishmen could stand in a lineup with other Dream Valley denizens and they wouldn’t look out of place.

@Evowizard25  
The only thing I can think of is the creatures from Lovecraftian lore. The fish dudes that made a deal with the people in Innsmouth.

@Sjogre  
Deep Ones? Who are they?

@Sjogre  
Oh. Well, now I learned something new. :3

@Tenafly Viper  
Making and controlling bubbles actually seems to be a sea pony power, and the unicorn, Fizzy, has bubbles as her magic trick.
 
If any group of characters could do it, it’s them.

@Evowizard25  
My guess is that they fell in battle against the Deep Ones. No explanation was ever given, but we do know that the bodies of water within and around Dream Valley have plenty of dangers.

I look at this, and all I can think is:
 
“How the fuck do you steer a BUBBLE?”

That’s an interestingly shaped crevice they disappear into. I’m gonna have to tag this as “unbirthing”.

@Sjogre  
Eh, force of habit.

@Sjogre  
Why did the moms disappear?
 
So the fins are hands? Like how g4 pegasus can manipulate their wings? {And while that may be true on their swimming habits, they can’t use it effectively…Of course this is a cartoon. Yeah, I know I shouldn’t apply real world logic to it, but it makes it more interesting when I do. Sorry about that.}

@Evowizard25  
What on anyone’s green Earth makes you think that mundane evolution has anything to do with the sea ponies?