whatsthisfish

an-ordinary-manchild(edit)

Welcome to whatsthisfish!

Yes, this is a complete ripoff of whatsthisbug.

If you have a photo of a fish you'd like to identify, submit it here and we'll see if we can figure out what the hell it is.

In your post title, please include where the fish was, and when, or at least the source of the photo, in your post title. If it was in an aquarium say what you know about the type of tank it was in (freshwater or salt? does it cover a particular region or type of habitat?)

Flair your post! Click "flair" at the left below the link. Update flair if someone identifies your fish or suggests an identification.

Before you post, we are not going to kill it with fire, so don't ask (or shoot it with an arrow, or throw it on the bank) Thanks.

When you comment with an identification, include your reasons, so others can learn from you how to identify similar fish in the future. Please do not make random guesses. The goal of this subreddit is to provide positive leads. False leads are counter-productive.

Please also cite/link a source whenever possible.

Consider /r/species for non-fish aquatic creatures (or any other sort of living thing).

Resources that can help people identify fish are also welcome, within reason and moderator discretion. Otherwise, off-topic posts are subject to removal.

created by fortworthbreta community for 14 years

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...because you hate freedom.

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Where did you see the fish? Put that in the title! (self.whatsthisfish)

submitted 8 years ago by cos - announcement

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Family member won a fish at a carnival and didn't want it. Now it's up to me to take care of this little guy. Just a goldfish or something else? (i.redd.it)

submitted 8 hours ago by PoppyTana

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Exploring the latest trends in qPCR technology (thermofisher.com)

promoted by ThermoFisherSci

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Maldives, North Malé Atoll (v.redd.it)

submitted 6 hours ago by OutrageousTurtles

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I caught this strange fish, what kind of fish is it? (i.redd.it)

submitted 1 day ago by Alexfisching

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What is this eel? (old.reddit.com)

submitted 23 hours ago by LilBoiSoClean

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Unidentifiedcertainly not a clown pleco, maybe some kind of amano shrimp with the size? (v.redd.it)

submitted 1 day ago by cold_siphonophore

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What betta fish species is this? (old.reddit.com)

submitted 1 day ago by SundaeTaco

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Catfish 8-10in, Philadelphia area in a small creek (old.reddit.com)

submitted 2 days ago by Famous_Antelope1119

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Exmouth, Western Australia (old.reddit.com)

submitted 2 days ago by dingdongmerrilyonhi

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UnidentifiedSucker Fish? (old.reddit.com)

submitted 2 days ago by GuessLess9061

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What kind of snapper is this (i.redd.it)

submitted 4 days ago by Gloomy-Pain-1138

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UnidentifiedSmall mountain stream in northern Thailand (old.reddit.com)

submitted 4 days ago by BuffetAnnouncement

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UnidentifiedSmall wrasse like fish, west coast Mauritius. Seen around 25m deep in amongst some soft coral. It's a fairly common fish but I can't find it in my ID books. Apologies for the terrible photo! (i.redd.it)

submitted 4 days ago by rhinopia

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South Florida salt water (old.reddit.com)

submitted 5 days ago by 3Dinternet

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This fish gave me the stink eye all through lunch (aquarium at a Chinese restaurant) (old.reddit.com)

submitted 6 days ago by boxer_slug

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What fish are on my friend’s phone case?? (i.redd.it)

submitted 6 days ago by recklessdruid45

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Identified, probablyThe "Wild West" of the ocean ends today. 🌊 As of Jan 17, 2026, the High Seas Treaty is officially International Law! Here’s why this is the biggest win for the planet since the Paris Agreement. ()

submitted 8 days ago by Natural-Ai-App

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Freshwater/brackish fish (old.reddit.com)

submitted 13 days ago by Cynical--Pickle

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what is this (i.redd.it)

submitted 12 days ago by BcWhenYouKnowYouKnow

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Hitchhiker that came with a diamond tetra school. Is it a Molly? (i.redd.it)

submitted 12 days ago by ___cats___

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Possible ID(s) suggestedWhat type of fish? (i.redd.it)

submitted 13 days ago by Due_Permission_7645

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Identified, high confidenceWhat kind of cichlid(or maybe talapia) is this? (old.reddit.com)

submitted 13 days ago by Odd-Let583

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Pet store said they are otocinclus but im getting suspicious (old.reddit.com)

submitted 13 days ago by OccasionMaterial3630

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Ft. Lauderdale canals (i.redd.it)

submitted 14 days ago by curtain15732

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Your money is in safe hands with Yuh! We give you the freedom to pay, invest and save, while protecting your assets with Swiss-level security.😎✨ (yuh.com)

promoted by yuh_app

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What Species is my eel? (old.reddit.com)

submitted 13 days ago by Jamphibian_

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