This is such an interesting question. In all honesty, I fear both, but I like the ocean or sea more. To me, both sea and space are actually mirrors of each other. Both are pitch black if you wander off too far, both possess pressures, both are extremely cold, both have vast unexplored spaces that humanity has not touched at all — they have more similarities than differences if you think about it. One thing for sure, one does have cute beluga whales meanwhile the other does not (it's my favorite animal).