Red Fins On Tiger Barbs

I have 2 green tiger barbs, and 2 tiger barbs (with 4 gold barbs), and noticed tonight that the tigers have all developed red fins, I'm positive they didn't have then before.

I'm guessing this isn't a good sign?

 

It's really hard to take pics of fish!

They all have it on their lower fun only

 

I believe it is to do with their gender and sexual maturity.
Also both types of barbs (the tigers and golds) should be kept in groups of 6+

 

I believe it is to do with their gender and sexual maturity.
Also both types of barbs (the tigers and golds) should be kept in groups of 6+

Oh really? My full intention is to grow them but it's a very new tank. I wanted to go softly softly at first

So they're just **** rather than sick?

 

Oh really? My full intention is to grow them but it's a very new tank. I wanted to go softly softly at first

So they're just **** rather than sick?

yup apparently xD