/r/whatisthisfish

Photograph via snooOG

A subreddit dedicated to identifying species of fish.

Have a fish you would like identified? Here's a place you can ask and hopefully get answers!


r/whatisthisfish is a forum for identifying different species of fish. Before posting, check that your content doesn't violate our rules below. If your submission does not appear, message the mods to check the spam filter.


Subreddit Rules

We have 6 rules here at r/whatisthisfish. Breaking any of these rules may force us to remove your comment, or post. Repeat or blatant rule breaking will result in a permanent ban. Do NOT private message or use reddit chat to contact moderators about moderator actions. Only message the team via modmail. Directly messaging individual moderators may result in a ban.

0: Mod discretion always applies. We may remove content that is technically allowed under the rules if the team has good reason to believe it is detrimental to the community. Conversely, if something technically breaks the rules but we deem it beneficial to the community, we may choose to leave it up.

0.1: You must communicate in English at r/whatisthisfish. We cannot moderate content in a language we do not speak. If you wish to communicate in your chosen language, you need to find a community that offers content in that language.


Please remember, you access this subreddit at the discretion of the mod team, and all rules are enforced at the mod team’s discretion. Moderators reserve the right to remove any content they deem harmful to the sub.


1: No off topic content, or joke posts. While we enjoy good humor, this is foremost an educational subreddit. Comments such as "Yup, definitely a fish." Or, "His name is Jerry." will be removed. Repeat or blatant offenders will incur a ban. This type of content is not original or funny, and makes it more difficult to get actual answers. We are not a forum for casual conversation. We are an educational ID forum, for identifying fish, and we expect all content to reflect that. AI and the use of AI are unwelcome in our subreddit.

2: Do not make blind/random guesses. Our goal is to provide positive leads; false leads are counter-productive, e.g. "similar looking" is rarely good enough at the species level. If one is unfamiliar with the taxon, practice diligence, e.g. check other members of the taxon, as well as those of higher taxa. If you aren't 100% sure, leave the ID to someone more knowledgeable.

3: Tag images involving death or gore as NSFW. Can I submit a dead fish for ID? Yes, but please bear in mind it’s always easier to ID living specimens. While we realize that extermination is sometimes necessary, comments promoting gratuitous violence against fish, or causing unnecessary suffering, (“kill it with fire” etc.) will be removed. Linking to subs that explicitly promote hatred is not allowed. Images containing death or gore (within reason; for example, stuffed specimens are exempt) must be tagged as NSFW.

4: Refrain from posting bites/injury related posts. We CANNOT and WILL NOT diagnose injuries or identify fish that allegedly caused bites/injuries. Seek medical advice, not our advice.

5: No monetary exchanges.

6: Don't Be a Jerk. Follow reddit's rules and "reddiquette".


Submission Guidelines

Got a photo of a fish you'd like identified? Submit it here and we'll try to figure it out together! Best view for ID is top-down, well-lit, low-contrast photos. Pictures are preferable to videos for ID requests but we'll work with what you have.

  • Indicate the geographic location.

  • Take the clearest and most detailed photo(s) possible.

  • Indicate the size. The more precise the better.

Provide any other information you feel could help!

FAQs & Wiki/Misc. Links


Related Subreddits

ID Subreddits


Sidebar last updated on September 17th, 2024. Rules are subject to change at the mod team's discretion.

/r/whatisthisfish

43,553 Subscribers

4

Smallmouth or largemouth?

9 Comments
2025/01/31
03:01 UTC

16

What is this? A jellyfish? [Caribbean Sea, MX]

5 Comments
2025/01/30
02:16 UTC

1

What is this fish?

3 Comments
2025/01/26
22:28 UTC

25

What is this fish that lives in a lagoon (Santiago, Chile)

I'm at a lagoon where you can buy a bunch of fish food and feed the fish, they go crazy for this, even competing with ducks, i was just curious as to what fish they are.

14 Comments
2025/01/26
18:28 UTC

7

Saw it in someone's aquarium, has a about and I've not seen it anywhere else

4 Comments
2025/01/26
16:34 UTC

1

What is this yellow fish in this persons tank

2 Comments
2025/01/26
06:04 UTC

43

What is this pottery tray fish?

15 Comments
2025/01/25
20:11 UTC

15

Ft. Lauderdale, FL

7 Comments
2025/01/25
01:35 UTC

15

Any clues?

Need help identifying this fish that washed ashore in Cascais, Portugal

4 Comments
2025/01/24
20:48 UTC

12

Found in a tide pool in Monterey

6 Comments
2025/01/24
04:05 UTC

11

Help me identify at least the family

12 Comments
2025/01/23
17:38 UTC

5

What Fish This? South East Asia, Myanmar.

1 Comment
2025/01/23
11:41 UTC

65

Who is this?

Saw him at a reptile store and fell in love. He was just swimming in place and there were probably 4 or 5 more of them in there.

36 Comments
2025/01/22
23:57 UTC

11

Small minnow

This fish was caught in upper blue lake California, from researching this area I think there are four possibilities. Tui chub, California roach, lahontan redside, and desert speckled dace. I caught small desert speckled dace here but the patterning and body shape was quite different so I don’t think it’s that, I also haven’t been able to find anything that shows the range of California roach going this far but it’s still a slight possibility afaik. Tui chub or lahontan Redside seem the most likely to me but the headshape and fat body lead me to believe tui chub. Is anyone able to confirm this? I’ve had this up on iNaturalist for quite some time now with no luck so this is the only other place I can think of asking, much appreciated!

2 Comments
2025/01/22
21:00 UTC

15

What is this fish. Caught in Costa Rica and I can’t find anything like it.

Hooked in the gills and bled out quickly

6 Comments
2025/01/22
12:40 UTC

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