Do fish know what the other gender of another is

[Octane92]

Post says it all my 4 in jag was next to my female red devil and just got another red devil yesterday which is nex to my female which she started to shake when first put it in tank now she attacking the divider and looks like her tube is dropping is my other a male?? She never act like this with the jag she's acting crazy but the new red devil is small

 

[Octane92]

Pic

 

[joe jaskot]

Of course they do. The female is the one wearing the high heels. LOL!

 

[Matteus]

I would imagine they are sensitive to the pheromones released into the water so they would be able to understand through hormonal responses.

 

[Octane92]

I would imagine they are sensitive to the pheromones released into the water so they would be able to understand through hormonal responses.

So in other words theres a chance that it's a male

 

[Matteus]

Absolutely there is a chance. But might need some more time before it would be mature. I have no experience with rd’s. but sounds like she seems into it.