Can I post a link to my biology-related product or service?
No, the rule "No Spamming" says do not use the sub to sell or advertise goods or services, and spam accounts are subject to an immediate ban without a warning.
Subreddit guides
r/biology rules, stats, and what to post
A source-backed Rankhog guide to r/biology: public rules, community context, posting fit, and startup-promotion risk before you publish.
By Anthony Riera, founder and operator of Rankhog.
Subreddit guides combine public Reddit source URLs, captured rules, visible verification dates, and Rankhog's account-safety workflow.
Current public stats
- Members
- 5,475,309
- Verified
- September 18, 2026
- Category
- Science and research communities
Rules can change, so Rankhog keeps verification dates and the original public Reddit sources visible.
Rule summary
- No ID requests: * Do not submit ID requests. There are other subs for that. Do not submit posts asking the sub to identify something in a photo or video. For example, do not ask what sort of insect is in a photo or the type of mold growing in your home.
- No Trolling: Any form of trolling, including concern-trolling, sea-lioning, flaming, or baiting other users will not be tolerated * No quarantined sub users **Automoderator will remove a post or comment if it:** * has been reported by multiple users * has been posted by a bot account, novelty account, throwaway account, or an alternate account created to circumvent a ban *Troll, bot, novelty, throwaway, ChatGPT and alternate accounts are subject to an immediate ban without a warning*
- No Spamming: Do not spam the sub. This includes content that is submitted or crossposted into more than 5 subs at a time. These items will be marked as spam and no advanced warning will be given. Do not use the sub to sell or advertise goods or services. **Automoderator will remove a post or comment and mark it as spam if it:** * contains any spam or comment spam * sells or advertises goods or services * contains links to pirated content *Spam accounts are subject to an immediate ban without a warning*
- No Hate Speech or Bigotry: Bigotry and hate speech directed towards groups of people based on race, gender, sexual orientation, gender identity, ethnicity, religion, national origin, immigration status, social status, religious affiliation or disability is not allowed This also applies to usernames. Do not justify bigotry. Do not incite hatred. The moderators have the final say on what is considered offensive enough to remove. *Users that break this rule are subject to an immediate ban without a warning*
- No Personal Attacks: All discussion must be civil. Engage with common decency towards others and treat others with courtesy. Personal attacks are not allowed unless you're calling out a bigot or anti-vaxxer. You may not use the sub to harass other users or mods. This includes calling a user a paid shill, paid troll, or any other personal attack.
- Quality control: Posts and comments are subject to removal if they do not fit the sub's purpose. * No homework posts. * Posts with less than a 50% karma score are subject to removal * No low effort posts. * No pseudoscience. * No requests to predict the results of evolution. * No meta posts. * No anti-vaxxers or COVID-19 deniers * No NSFW posts * No opinion articles * No content featuring dead animals * No questionable studies * No studies with ethical concerns * No ChatGPT, AI, or similarly generated content
- No medical questions: Do not use the sub to ask medical questions. There are other subs for that. Do not use the sub to ask to interpret your (or someone else's) medical results. Do not use the sub to ask personal health questions. For example, don't ask if you'll grow any taller. As another example, don't ask what blood type you have. Do not use the sub to ask if you can eat a specific item; this includes hypothetical questions.
- No conspiracy theories: Do not submit posts about conspiracy theories. Do not submit posts about paranormal content.
- Do not submit posts about religion: Do not submit posts about religion. There are other subs for that. Do not use the sub to proselytize for any religion.
- No surveys: Surveys and polls are not allowed * Do not ask this sub to participate in research studies or academic surveys * Do not ask the sub to participate in a homework survey or user created poll
- Low Karma: Posts are automatically removed by a bot without any penalty if you do not have a reasonable amount of post *and/or* comment karma on your account. * These limits are in place to prevent spam, bot, and troll accounts from posting on the sub. * These limits are in place whether you have a brand new account or an old account with low karma. * You can attempt to submit another submission at a future time when your account has accumulated more karma. **There are no exceptions to this**.
- "Question" post: Top Level Comment Must Contain a Serious Answer: On "question" flaired posts, top level comments must be well thought out, informed, answers. Top level comments do not need to contain sources but should contain enough information to answer the question. Single sentence, anecdotal evidence, or one word answers will be removed.
Works well
- A text post that shares a peer-reviewed biology finding and explains why it matters, with no product links or promotional language.
- A question flair post that asks a specific, informed question about a biological concept, where you engage with serious, well thought out answers in the comments.
- A comment on an existing discussion where you add a science-based perspective from your own expertise, without mentioning your company or product.
Avoid
- Do not submit posts asking the community to identify an insect, plant, mold, or anything else from a photo or video, as the rule "No ID requests" forbids it.
- Do not post homework questions, surveys, polls, or requests to participate in research studies, as these are banned under "Quality control" and "No surveys".
- Do not ask personal health questions or request interpretation of medical results, as "No medical questions" prohibits it.
- Do not use the sub to sell or advertise goods or services, as "No Spamming" bans promotion outright.
- Do not post ChatGPT, AI, or similarly generated content, as it is banned under "Quality control".
- Do not post conspiracy theories, paranormal content, or religious content, as "No conspiracy theories" and "Do not submit posts about religion" forbid them.
What r/biology Is For
This community is a place to discuss all things biology, and it welcomes people and content from all related fields. The rules make clear that it is for serious, civil discussion of biology topics, not for homework help, identification requests, medical advice, or promotion.
Rules That Matter Before Posting
The rule "No Spamming" is the one that decides whether a marketing-adjacent post survives, because it says do not use the sub to sell or advertise goods or services and warns of an immediate ban without a warning. The rule "Quality control" also matters, because it bans low effort posts, pseudoscience, opinion articles, questionable studies, and ChatGPT or AI generated content. The rule "Low Karma" means a bot will automatically remove your post if you do not have a reasonable amount of post or comment karma, with no exceptions. The rule "No surveys" blocks any poll, research study, or academic survey. The rule "No ID requests" blocks posts asking the community to identify something from a photo or video. The rule "No medical questions" blocks personal health questions and interpretation of medical results.
What To Post
A good post here is a genuine discussion about a biology topic that fits the community's purpose and meets its quality standards. You need an account with a reasonable amount of karma before you even try, because the rule "Low Karma" says a bot will remove your post automatically if you do not. If you post a question, use the question flair and make sure your top level comment or the answers you engage with are well thought out and informed, because the rule "Question" post says top level comments must contain a serious answer. For a founder doing respectful Reddit marketing, the only safe path is to participate as a real member of the community by sharing informed, science-based discussion without any promotional intent.
What To Avoid
Avoid anything that trips the rule "No Spamming", which means no selling, no advertising, no crossposting into more than 5 subs at a time, and no links to pirated content. Avoid low effort posts, pseudoscience, opinion articles, questionable studies, and ChatGPT or AI content, as all are banned under "Quality control". Do not ask the community to identify plants, animals, or molds, because "No ID requests" forbids it. Do not post homework questions, surveys, or medical questions, as each has its own rule. Do not post conspiracy theories, paranormal content, or religious content. Do not use throwaway, bot, novelty, or alternate accounts, because "No Trolling" says they are subject to an immediate ban without a warning.
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Common questions about r/biology
Can I share a survey or research study for my startup?
No, the rule "No surveys" says surveys and polls are not allowed, including requests to participate in research studies or academic surveys.
Can I post content generated by AI tools like ChatGPT?
No, the rule "Quality control" says no ChatGPT, AI, or similarly generated content is allowed.
Can I post with a brand new account or an account with low karma?
No, the rule "Low Karma" says posts are automatically removed by a bot if you do not have a reasonable amount of post or comment karma, and there are no exceptions.
Can I ask the community to identify a plant or animal from a photo?
No, the rule "No ID requests" says do not submit posts asking the sub to identify something in a photo or video.
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