• We are currently upgrading MFK. thanks! -neo

Denisonii (roselines) develop butterfly fins with age?

jcardona1

jcardona1

Feeder Fish
MFK Member
So I've had this group of denisonii / roseline barbs/sharks for a while now. They are pretty much full grown, thick beastly little things. Over the past few months I've noticed that their fins have been getting long, almost like a butterfly koi. This is the first time I've ever seen Puntius Denisonii with long flowing fins like this.

Is this normal? Do they develop long flowing fins as they mature and grow? Whatever it is, they look pretty damn awesome!

CLICK FOR FULL SIZE

6313411363_007c0d354b_b.jpg


6313931926_af3aca2d27_b.jpg


6313931644_cb95ac07bc_b.jpg



And here's the same fish back in December 2010...

5227902191_bff3079bd7_b.jpg
 
Good catch. They all have white tips, when they used to be bright yellow. The only thing I've done differently with them is keep them in RO water. Aside from that, nothing. In fact, here they are in May 2011, normal fins and yellow spots! :nilly:

5682777880_851b1e8c25_b.jpg
 
Yup, all 6 of them have the long fins. No idea on what sex they are. I had them in a 57g tank before and they were fine. I'd say 55-75g would be ideal for a small group of them. They are nonstop, active swimmers.
 
jcardona1 said:
Yup, all 6 of them have the long fins. No idea on what sex they are. I had them in a 57g tank before and they were fine. I'd say 55-75g would be ideal for a small group of them. They are nonstop, active swimmers.
Click to expand...

maybe you got all males by chance, I can't think of anything else. Thanks for the input, I'm thinking of putting 3-6 in an asian coldwater river tank setup
 
these are my top favourite fish, yours are absolutley stunning and the finnage is very intresting. they are a lot less commonly kept and a lot less are kept till they mature well. so it is possible that this has not been noticed too much but i have a big als in my area and they have huge roseline sharks there but their fins are normal so this is quite a strange anomoly. btw i love your tank set ups they are amazing.
 
Wow! Those look awesome. My lfs has about 5 in a large not for sale display and they look nothing like that. They are huge but have yellow and normal looking fins. Beautiful fish, but nowhere near as nice as yours. Nice job!

Areas they still in the Discus tank? I wonder if the higher temps have any bearing
 
Jc1119 said:
Wow! Those look awesome. My lfs has about 5 in a large not for sale display and they look nothing like that. They are huge but have yellow and normal looking fins. Beautiful fish, but nowhere near as nice as yours. Nice job!

Areas they still in the Discus tank? I wonder if the higher temps have any bearing
Click to expand...

A LFS here has some big ones in a display as well... Normal fins, yellow caudal markings.
 
You must log in or register to reply here.
Back
Top