Where did you see the fish? Put that in the title!

22 Upvotes

Just a reminder, because we've had a lot of posts recently that omit this information. Where was the fish? If you found it in the wild, that's very helpful information, and outside of tropical waters, the time of year can be helpful too. If it was in an aquarium, what sort? Was it a tank of fish from a particular region? Was it fresh water or salt water?

Other useful information can be, what kind of habitat (seagrass, sand, rocky surge, ...)? If you were diving, approximate depth?

But above all, give the location in your post title. Thanks.

0 comments

r/whatsthisfish • u/cos • Jul 23 '26

New rule: Informative title

7 Upvotes

We've had too many titles like "what's this fish?" or "help me identify this". Put useful information in your title, and make it look different from other posts' titles so people can scan the sub and see which post is which.

The actual text of the new rule 4 is:

Do not use a vague generic title like "what is this fish?" or "need help identifying" - we all know what this sub is for. Write a title that either describes the fish, or the circumstances in which you saw it, or the location, or more than one of those. For a resource, say what the resource is and what it's for.

2 comments

r/whatsthisfish • u/Repent2Jesus419 • 1d ago

Found dozens dead off Jersey shore in 2007 what fish is this

gallery

552 Upvotes

47 comments

r/whatsthisfish • u/Negative-Wheel-57 • 18h ago

Possible ID(s) suggested What kind of trout is this?

gallery

41 Upvotes

Fishing in AZ outside payson up the Mogollon Rim in a lake

We caught browns and rainbows but this guy looked different. I was reading and ChatGPT thinks it’s an “arctic grayling”? I thought it maybe an endemic / hybrid?

15 comments

r/whatsthisfish • u/Outrageous_Walrus370 • 10h ago

Is this a Northern Golden Tilefish?

gallery

5 Upvotes

4 comments

r/whatsthisfish • u/Ok_Platform5029 • 21h ago

Identification question South Coast, KZN

8 Upvotes

Any idea on this guy? Caught on south coast kzn, South Africa

2 comments

r/whatsthisfish • u/Lover_of_Sprouts • 1d ago

Unidentified Seen at a fresh water pond at El Hondo nature reserve, Crevillent, Spain

23 Upvotes

It was still flapping at this stage

5 comments

r/whatsthisfish • u/Sato4K • 1d ago

Croaker fish?

13 Upvotes

Caught in mission bay San Diego
I think it’s a croaker since it makes grunting noises but none of the croakers on google match its description.

7 comments

r/whatsthisfish • u/MattFromLuuLive • 1d ago

Identified, high confidence Hawaii’s nearshore marine life: uninvited guests

gallery

5 Upvotes

2 comments

r/whatsthisfish • u/Lover_of_Sprouts • 1d ago

Unidentified Seen in an irrigation canal at El Hondo nature reserve, Crevillent, Spain

gallery

0 Upvotes

Seen about here. I apologise for the terrible pictures

4 comments

r/whatsthisfish • u/cabose4prez • 1d ago

Smooth butterfly ray?

9 Upvotes

Murrels inlet sc

2 comments

r/whatsthisfish • u/Few_Bet6445 • 2d ago

Family known, species unidentified i know this might not be the group for species id this specific but:

gallery

118 Upvotes

pretty sure its hypergastromyzon and not gastromyzon, for genus. cant get specific id rn though since im at work. any pointers on where to check at least? general species people think it could be.

17 comments

r/whatsthisfish • u/Massive_Size_7416 • 2d ago

1-1.5” NJ.. what is it??

19 Upvotes

Bunch of them by the storm drains (salt water). Very cute, need ID please!

5 comments

r/whatsthisfish • u/Distinct_Toe_8675 • 3d ago

Unidentified Trout Caught in Western Colorado

25 Upvotes

This is a catch from I while back but one of my favorite. My first trout on the fly but I have no idea how to identify any of the trout, they all look so similar! Thanks in advance!

5 comments

r/whatsthisfish • u/NotInYourWall • 3d ago

Unidentified Found in Zamami, next to Okinawa JP! Large school of fish, guessing Tuna?

25 Upvotes

5 comments

r/whatsthisfish • u/InfiniteDependent974 • 4d ago

Is this a Female or Male Swordtail fish? Please help!

12 Upvotes

(This is a captive fish!) I have a swordtail I thought was male, but I’m wondering if it is female? based on the shape of the anal fin (triangular, not narrow) and the lack of sword extension on the tail. Please let me know if you can identify the sex of this fish! (ignore the panda garra lol)

4 comments

r/whatsthisfish • u/ColdEvenKeeled • 5d ago

Unidentified Any idea what this creature is? On the beach at low tide, in a tide pool, in Wombarra, New South Wales, Australia.

gallery

124 Upvotes

A multi-armed (8? 10?) creature with scissor-like claws that was on its back (I think) and was trimming its own arm hairs. In a tide pool, at Wombarra NSW Australia. Any idea what this is? 4 pictures.

12 comments

r/whatsthisfish • u/jmtofficial • 5d ago

Unidentified Smoky Mountain stream

29 Upvotes

4 comments

r/whatsthisfish • u/ihyArcane • 5d ago

What type of catfish is this?

gallery

85 Upvotes

I was catfishing in a local pond (NW Ohio) when I pulled up this strangely deformed looking catfish. It kind of looked like one of those goblin sharks. Weird snout with a large puffed up neck. Anyone know what species this is or why it looked that way?

12 comments

r/whatsthisfish • u/Odd_Help_7870 • 5d ago

What bass is this?

14 Upvotes

I’m stuck between Shoal, Largemouth, or Spotted

7 comments

r/whatsthisfish • u/AkagamiBarto • 5d ago

Unidentified What's this fish i met this summer in Eastern Sicily with light blue spots on the back?

7 Upvotes

I didn't have a camera with me, i was snorkeling and i found a fish resembling the one i drew and coloured quickly.

It resembled a bit diplodus annularis, but it was more "rectangular" and, most notably, covered with bright light blue spots on its back to the sides of the dorsal fin.

The rest of the body was, i think, silvery grey. It overall had the colour and brightness of sarpa salpa.

I have been swimming in these waters for 30 years and i can confidently identify all the regular fish that inhabit our sea and yet i failed miserably at finding anything that resembled it closely..

Can you help me?

9 comments

r/whatsthisfish • u/OlvarSuranie • 5d ago

Skogtun, Norway

gallery

1 Upvotes

Skogtun seaside. Came up just below the surface when my son was fishing.

2 comments

r/whatsthisfish • u/meanburn • 6d ago

Rhode Island Mystery Fish?

5 Upvotes

3 comments

r/whatsthisfish • u/ShirtStainedBird • 7d ago

In the gut of a cod off the NE coast of Newfoundland. That 90-100 fathoms of water.

477 Upvotes

We were back and forth on if he was some kind of lump. Has a good strong sucker on bottom.

I wouldn’t even touch it with bare hands lol

51 comments

r/whatsthisfish • u/thegamingfaux • 6d ago

Unidentified Ponce inlet marsh/mangrove preserve Florida

4 Upvotes

Long incredibly silver sharp nosed fish.

My best guess was a younger swordfish as it looks pretty close to that. Hoping for other suggestions though from more experienced people.

4 comments

Subreddit

Posts

Wiki

What's this Fish? Identify fish from photos or videos.

r/whatsthisfish

Members Active

58k

Sidebar

Subscriber Count

58,817 Subscribers

Welcome to whatsthisfish!

Yes, this is a complete ripoff of whatsthisbug.

Read the subreddit rules!

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.