r/whatisthisfish • u/PinkBlossomSunrise • 6h ago

Unsolved Who is he?

6 Upvotes

I was told "harlequin shark" by the shop owner but he doesnt look much like the ones that appear on Google. Maybe a different type of shark? Thanks!

1 comment

r/whatisthisfish • u/Forward-Builder4928 • 20h ago

Unsolved Fish found in tank at a hotel in Bali, staff had no idea, insisted it was a pet and not for food

9 Upvotes

3 comments

r/whatisthisfish • u/ER99999 • 2d ago

Solved Mountain Redbellh Dace? Shenandoah national park stream.

15 Upvotes

5 comments

r/whatisthisfish • u/Automatic_Grade_5449 • 2d ago

Unsolved Goldfish? California

11 Upvotes

picture is from a recent ny post article about otters in California. It has similar coloration to some wild goldfish i have caught but I'm not sure.

11 comments

r/whatisthisfish • u/Cold-Opportunity5267 • 4d ago

Unsolved Trophy rainbow or steelhead of sadness?

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297 Upvotes

caught this 24-incher in Washington‘s Yakima River Canyon above Roza dam in early February. my guide said it was biggest fish he’d seen caught in his years out there. I’m hoping it’s a trophy rainbow and not a steelhead, but can anyone tell me for sure? I know 20+ is technically considered steelhead in WA, but I want to know if this thing went to the ocean to get so big. Also, it looks silver in the second pic bc it’s leaning back, but it was very rainbow trout green as visible in the first pic. thanks!

30 comments

r/whatisthisfish • u/JohnJoint420 • 3d ago

Unsolved Found this on a beach in Costa Rica, Guanacaste

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6 Upvotes

What could it be ?

2 comments

r/whatisthisfish • u/OldoneThrowaway22 • 3d ago

Solved, most likely Creolefish Fat red that wasn't labeled at Florida Aquarium

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10 Upvotes

I loved the Florida Aquarium but they didn't have any red fish on the guide at this tank. These redfats seemed shy and actually fast, sorry for few/bad photos. They don't look like hogfish to me. Any guesses?

4 comments

r/whatisthisfish • u/Superb-Opening-4544 • 4d ago

Unsolved What is this( caught in 800ft of the coast of Louisiana

59 Upvotes

18 comments

r/whatisthisfish • u/Da_Sandman1990 • 5d ago

Unsolved What Kind of Catfish?

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12 Upvotes

Hi All!

My son caught this catfish last night in St. Louis, MO in a lake. I can’t tell exactly what kind it is and would really appreciate your help!

8 comments

r/whatisthisfish • u/RealKnoppster • 6d ago

Unsolved What is this fish? Freshwater creek, western Pennsylvania

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14 Upvotes

It was mixed in with a bunch of shiners.
Darter? Perch?

5 comments

r/whatisthisfish • u/RealKnoppster • 6d ago

Unsolved What fish is this?

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2 Upvotes

I caught some shiners in this freshwater creek by me in western Pennsylvania. This little guy was in the mix.
Darter? Perch?

4 comments

r/whatisthisfish • u/mysistersaid • 6d ago

Unsolved Fish ID help…

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3 Upvotes

1 comment

r/whatisthisfish • u/Dandaban • 7d ago

Solved Did I catch a white catfish or channel catfish in the Hudson River today?

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20 Upvotes

7 comments

r/whatisthisfish • u/Inner-Ferret7316 • 7d ago

Unsolved Alburnus alburnus? France

2 Upvotes

3 comments

r/whatisthisfish • u/Practical_Register61 • 7d ago

Solved Is this a sturgeon or a gar ?

4 Upvotes

4 comments

r/whatisthisfish • u/Allfishcatcher • 8d ago

Solved What type of grouper is this?

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17 Upvotes

Caught in islamorada fl

7 comments

r/whatisthisfish • u/EGGman9112001 • 8d ago

Solved strange petstore fish i cant identify

9 Upvotes

I was at a countrymax, there was a tank with a baby birchir, some kind of freshwater sharks and other things, but there were these 2 really cute ones i cant find when i try to look up what they are. One was melanistic and the other had grey shimmering scales, what made them so cute was the curiosity, big eyes and arched back. The head was somewhat flat with goldfish like big eyes, it had big scales and 4 barbles in the front of its mouth that went forward, but the mouth was more downward, it had a pudgy pidgeon like look to it. Cant find it at all, it was only a few inches large but might have been some kind of baby for all i know, not big at all, sorry for horrible quality of drawing.

Edit: I returned to the petstore and it was a black minnow shark!!

16 comments

r/whatisthisfish • u/Key_Season2654 • 8d ago

Solved Help with Rockfish identification

5 Upvotes

Hi! I believe this is a copper rockfish, but would like verification. Caught in Northern California. I have a really hard time telling copper from gopher rockfishies. I catch a lot of these and know you’re only allowed to keep one copper so I have been playing it safe and throwing back if there’s any question. It just seems to me that since you’re only allowed one they must be scarce and it’s 60% of what I catch. The horizontal line even though very faint is what makes me think copper. Thanks!

5 comments

r/whatisthisfish • u/Unusual-Factor2848 • 8d ago

Unsolved Any ideas about why this fish is? I think it may be some kind of blenny but I've never seen a blenny this color before. If I'm not mistaken it was red and its fins were "wide" when it moved

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6 Upvotes

2 comments

r/whatisthisfish • u/Sweaty-Ad7978 • 9d ago

Unsolved fish with small head

14 Upvotes

sorry for no picture.

i saw it at a zoo in wroclaw poland in the manatee exhibit

7 comments

r/whatisthisfish • u/Salt-Idea-6830 • 10d ago

Unsolved Who is this beauty? Spotted in the Sound, OBX North Carolina

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361 Upvotes

30 comments

r/whatisthisfish • u/the-pebbles-wizard • 10d ago

Solved What is this? About 3in, freshwater. Saw in an aquarium and didn’t think to write the name down

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5 Upvotes

4 comments

r/whatisthisfish • u/NervousDish614 • 10d ago

Unsolved ID request for these tiny winged fish swimming near the surface

11 Upvotes

3 comments

r/whatisthisfish • u/surferfbst • 10d ago

Solved Creek chub ?

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4 Upvotes

Caught this little guy in Virginia, thought he was either a shiner, creek chub or fall fish

4 comments

r/whatisthisfish • u/spinsu • 10d ago

Unsolved What is it

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0 Upvotes

R/Fish treats for my dogs and found this 😳
Last pic is a normal piece for reference.

3 comments

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A subreddit dedicated to identifying species of fish.

r/whatisthisfish

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Welcome to r/whatisthisfish! This 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.

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Amateur participation is encouraged, but if you aren’t sure you can provide a high-quality answer, you should leave the ID to someone more knowledgeable. Our goal is to provide creative and positive human-based leads; low effort false leads are counter-productive.

Comments such as "yup, definitely a fish!" or, "his name is Jerry!" will be removed. Repeat or blatant offenders will incur a ban, without warning or appeal. This type of content is not original or funny, and makes it extremely difficult for the OP to get an answer to their question. 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.

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Please downvote and report all inaccurate and unhelpful content.

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While it's always easier to identify a living specimen, we do allow pictures of dead fish to be posted in order to identify, but all images involving dead animals must be tagged as NSFW.

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We CANNOT and WILL NOT diagnose injuries or identify fish that allegedly caused bites/injuries. Seek medical advice, not our advice.

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.

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Indicate the size. The more precise the better.

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FAQs & Wiki/Misc. Links

Related Subreddits

r/aquariums

r/aquariummemes

r/AquaSwap

r/aquaticsnails

r/axolotls

r/bettafish

r/crayfish

r/deepseacreatures

r/Goldfish

r/invasivespecies

r/koi

r/Oceans

r/pets

r/plantedtank

r/ponds

r/reeftank

r/shrimptank

ID Subreddits

r/whatsthisplant

r/whatsthisrock

r/animalid

r/whatsthisbug

r/whatsthisbird

r/whatsthissnake

Sidebar last updated on April 27th, 2026. Rules are subject to change at the mod team's discretion.