So, I hadn't played stardew valley in like a year but decided to get into it again 'cause of the new update. Currently I'm at year 1 and it's spirits eve. I had already finished all my farm work by early morning so I used a totem to warp to the beach in order to get some fishing done. I was standing at the very edge of the dock and at around 5:00 pm some kind of monster (real 'shape of water' looking) started swimming away from the beach and out into the ocean. I have NO mods installed. Is this an easter egg that came with the new update? I couldn't find anything about it on the wiki.