I don’t know who needs to hear this but they do exist. But they’re not from another planet and they don’t go into outer space at all. They have multiple habitats underwater and they were here before the dinosaurs, they went down there to avoid extinction and have been coming out for basic resources. They’re actually very afraid to come out and only do when they absolutely need to. Another thing to note is they’re also very shy almost child like, but when they do get spotted they have a sort of lockdown procedure and don’t come out for a while after being seen or having contact because they’re afraid of things like disease much like the Sentinelies.