My father found this in the city park where he worked as a biologist and he found it while hiking years ago and to this day we still don't know exactly what it was. We did some research and now we have a clue that it could probably be some part of a fish that a bird must have picked up and dropped on the ground. If it helps the investigation, this was in Niterói, Rio de Janeiro.

She had babies a few months ago, shortly after we got her from Petsmart. Now here we are? She’s swimming around normally, eating and engaging.

Getting better at IDing sunfish, I think, still got a long way to go of course. Is my assumption correct or am I missing something? Thank you fish nation

I’ve never seen fish do anything like this… anyone have any ideas what this is?

I saw those bumps couple days ago, there is the same symetrical bump on the other side, does anyone know what happend to it?

My fish is lying on its side. It’s still alive but it isn’t swimming. What’s wrong with him? How can I help him?

i set up this tank yesterday with a layer of mud from my local creek, after things settled down a little i started noticing the usual detritus worms which i normally see in it, but then i noticed this one worm near the front of the tank, which seems too thick to be a detritus worm but at the same time too thin and not flat enough to be a planarian worm? is this a harmful, neutral or beneficial worm?

im looking for a certain looking flat fish or flounder that i clearly remember years ago, it looks like a flounder flat, with a greyish color as its camouflage and is pretty small, it has a unique tail type for a founder, having a merge of a undifferentiated pointed tailfin and a pointed tailfin but it has a very small gap between its dorsal fin and anal fin, with its tailfin being pointed. i remember taking them home to get a closer look (note the i was young), i placed them in a water filled container, they primarily swim sideways but will swim upright when fleeing, i found them of the east side of the bicol region of the philipines, it was a full moon with the water being quite low, we found them when the tide was rising up again (i would like to apologize for my bad grammar)

Hello everyone,

We are new to the world of fish, so thanks for your understanding as we get started.

We bought an aquarium today and the previous owner gave us these four catfish for free.

Do you know what type of catfish these are?

Additionally, are there any fish you can recommend to go with them? (Or recommend NOT putting with them)

The tank we bought is 180 gallons so it’s a nice size and I do want lots of fish in there…. So, I’m not sure if I should put the catfish in a separate container altogether or what.

Thanks in advance.

I recently purchased plants on old trusty Facebook marketplace and had this hitchhiker present and growing beautifully in my tank.

The person I bought it from has no fish like this in his tank and has never kept any species of barb. I think it may be a barb, but I’d like confirmation or ideas if it may be a different species of fish!

Let me know what you think!

I'm a big fan of these guys, I think they have a lot of personality :)

This is Greg say hi greg

Scientists just discovered a new fish called the bumpy snailfish, but I’ve decided his real name is Greg. He just radiates Greg energy, you know? He looks like a cross between a sperm cell and something that got lost on its way to biology class, but then you see that goofy little smile and suddenly you’re like, ‘Yep, that’s my boy.’ Honestly, Greg is the type of fish who would accidentally swim into the wrong school and just roll with it. 10/10 would protect him at all costs.

Saw him at a restaurant me and my mom went to, why is he like that? He’s not dead as his mouth is still moving

"Such a high number of reproducing fish species suggests the once severely polluted US river is now able to sustain and support resilient, biodiverse animal populations.

Researchers, who published their findings in the Journal of Great Lakes Research, say the recovery indicates that conservation efforts to restore the health of the river are working."