Skip to content

r/marinebiology↗

Marine Biology Subreddit

This is a community to share and promote marine biology research and education.

149k subscribers171 posts / mo in Sep 2026159 authors / mosince 2010

r/marinebiology has 149k members (+6.4% over the last 12 months). It gets about 171 posts a month from 159 people. Top topics: Beach Washups, Deep Sea Creatures and Jellyfish Identification.

Free report

When to post on r/marinebiology

You've used today's free reports

Visitors without an account can open 3 subreddit reports a day. The best time to post on r/marinebiology, removal risk and the rest of the report are one step away.

Size and growth

How r/marinebiology has grown

r/marinebiology

Subscriber growth

Subscribers over time

+6.4%in 12 months · +1.1% in 3 months · +0.3% in 1 month
Oct 2026149k
Growing149k subscribers
Data since Mar 2018Live · through Oct 2026
r/marinebiology

Monthly activity

Posts, comments and authors per month

−20%vs Sep 2025 · −18% last 3 months vs the 3 before
Sep 2026171
QuieterPeaked at 503 in Aug 2022
Data through Sep 2026 · October usually lands mid-November

What people talk about

Topics and brands on r/marinebiology

Top topics

Share of the subreddit's posts

  1. Beach Washups2.2%
  2. Deep Sea Creatures1.8%
  3. Jellyfish Identification1.2%
  4. Jellyfish Oceanonders0.6%
  5. Giant Squid Exploration0.6%

Brands people mention

Most-mentioned brands and sites, last 12 months

  1. iNaturalist
  2. ResearchGate
  3. ScienceDirect
  4. Doi
  5. Wiley

The full report

Everything else about r/marinebiology

Posting rules and account requirements, how often posts get removed, who writes here (age, gender, countries), what people ask for, how they talk, and related subreddits — all in the full report.

Posts and activity for Sep 2026. Members from Reddit's subscriber counts. Read from the same data the app runs on. Our research