fish/ weird lettering in the mountain?

[D3M0N-SNYP3R]

near the start there is a weird giant fish shaped thing, its by the water. ill get a video of it after im done eating. anyways yeah i found that.... and it has an odd character (like a letter not a playable character) on it, that i cant say i've seen before... oh and BTW, when i go up through the cave first, and head to the lighthouse, if the powers not on yet, and i already hit the easter egg, when i get to the lighthouse i hear the easter egg noise (like you just hit the music one, but no music ones outside of lighthouse? anyways thats just my 2 cents for now :D

[stylishjm]

might be something to do with the Elephant noises in the lighthouse & star staying in the sky after doing the co-op/solo easteregg

[TwAnKiEs]

I noticed the "scratchings" in the room where you go get the fuse. Its in between Flopper and the table...

[D3M0N-SNYP3R]

the star is in the sky? i havent completed it yet, but im going to today. i have a few ideas.

[Nikolai: The Hero]

might be something to do with the Elephant noises in the lighthouse & star staying in the sky after doing the co-op/solo easteregg

That would be a sonar, using morse code to talk to the submarine.

[thegreenergrass]

Is it the GK logo?

[D3M0N-SNYP3R]

lol Gk logo. no its a dagger fish thing. look it up. im not sure what it is.