About r/thalassophobia
In its own words:
Less than 10% of the ocean has been explored. For more information see: https://reddark.untone.uk/
Community guide
r/thalassophobia (#621, about 1.7 million subscribers) is oriented around: Less than 10% of the ocean has been explored. For more information see: https://reddark.untone.uk/ Recent activity samples show 4.0 posts/day in recent samples (~67% video, ~30% image, ~3% text). Public rules we collected include: Only thalassophobia related posts and titles; Restrictions on sea life; Use proper titles; No jokes, memes, or cartoons; Be nice and courteous.
What belongs here
Stay inside the room’s stated scope rather than adjacent fandoms or general off-topic dumps. Low-effort memes or empty shitposts are commonly removed—add context that fits the room’s purpose.
How it differs from lookalikes
The length of the public rule list is itself a signal: skim all of them once before assuming defaults from similar communities.
Practical pointers
Read the current sidebar/rules on Reddit before posting; collected rules can lag. Search the sub before reposting common clips or questions. Avoid clickbait titles; say what the post actually is. Common flairs in samples include: (OC) Art, Question, OC, Animated/drawn.
SubMouse Editorial
The community was created on Jun 3, 2013, which makes it 13 years old. Since Oct 26, 2026, it has gained 859 subscribers (+0.05%). It sits just behind r/pregnant (#620) and ahead of r/Turkey (#622) in our ranking.
What sets r/thalassophobia apart
r/thalassophobia is far more video-driven than most big subreddits: 67% of its recent posts are videos, against a median of 4% across the Top 100. Relative to its huge audience, posting is calm — around 2.3 new posts a day per million members, which puts it in the quietest fifth of the Top 100. A good post has less competition here.
Subscriber growth
Between Sep 19, 2026 and Nov 2, 2026, r/thalassophobia grew from 1,737,338 to 1,744,459 subscribers (+7.1K, +0.41%). That is about 162 new members per day. The chart uses our weekly snapshots (9 so far), so it gets longer every week.
What r/thalassophobia talks about
We read the titles of 30 recent posts (Oct 29–Nov 4), the words that come up most are “sea”, “game”, “deep”, “ocean” and “ground”. Other frequent themes are horror, fine, thanks, seek, eternal and ascending. Recurring phrases include “horror game”, “ground thanks”, “eternal ascending” and “deep sea”. By format, 67% are videos, 30% are images and 3% are text posts.
Popular post flairs: (OC) Art (2), Question (2), OC (2), Animated/drawn (1).
Activity and best time to post
r/thalassophobia gets about 4.0 new posts a day. The public archive holds 79,707 posts and 1,340,356 comments in total, about 16.8 comments per post. Last week the busiest day was Friday (8 posts) and the quietest was Tuesday (1). Posting peaks around 14:00 UTC and is lowest around 00:00 UTC.
Rules of r/thalassophobia
The moderators of r/thalassophobia list 8 rules. In short:
- Only thalassophobia related posts and titles
- Restrictions on sea life
- Use proper titles
- No jokes, memes, or cartoons
- Be nice and courteous
- No Reposts
- No gore
- Posts with game or AI content may only be posted on Friday
How to join
Open reddit.com/r/thalassophobia and press “Join”. Read the community rules in the sidebar before you post: every subreddit is run by its own volunteer moderators.
Frequently asked questions
How big is r/thalassophobia?
r/thalassophobia has 1,744,459 subscribers (Nov 2, 2026), which makes it the #621 safe-for-work subreddit in the SubMouse ranking. It added 7,121 members between Sep 19, 2026 and Nov 2, 2026.
How old is r/thalassophobia?
r/thalassophobia was created on Jun 3, 2013, so it has been around for 13 years.
How active is r/thalassophobia?
Moderately: r/thalassophobia gets about 4.0 new posts a day (average of the last four weeks). Over its lifetime the archive counts 79,707 posts and 1,340,356 comments.
When is r/thalassophobia most active?
Based on post counts from Oct 29, 2026 to Nov 4, 2026, the busiest day was Friday and the quietest Tuesday, and most posts arrive around 14:00 UTC, with the fewest around 00:00 UTC. More posts also means more competition, so a quieter hour can help a post get noticed.
What is r/thalassophobia about?
The community describes itself as: “Less than 10% of the ocean has been explored. For more information see: https://reddark.untone.uk/” Recent post titles often mention sea, game, deep, ocean and ground. Most posts are videos (67%).
Is r/thalassophobia safe for work?
Yes. Reddit does not mark r/thalassophobia as an 18+ (NSFW) community. SubMouse lists safe-for-work subreddits only.
How do I post on r/thalassophobia?
Join the community on Reddit first, then use “Create post”. r/thalassophobia accepts both text and link posts, with images, videos, galleries and polls enabled. It has 8 posted rules, starting with: “Only thalassophobia related posts and titles”; “Restrictions on sea life”; “Use proper titles”. Moderators remove posts that break the rules, so read them in the sidebar before posting.
Which communities are like r/thalassophobia?
Communities with similar topics include r/awfuleverything (1.4M), r/4chan (1.4M), r/reallifedoodles (2.2M), r/15minutefood (3.8M) and r/greentext (1.4M).
Stats from public data (data updated Nov 2, 2026; activity, rules and archive totals via the Arctic Shift archive, Nov 6, 2026). Point and comment counts are archive snapshots and can be lower than on Reddit today. SubMouse is an independent directory and is not affiliated with Reddit or the moderators of r/thalassophobia.