Welcome to Koi Forum. Is this your first visit? Register
Results 1 to 7 of 7
  1. #1
    Junior Member Rank = Fry CR_KOI's Avatar
    Join Date
    Jun 2017
    Location
    High Wycombe, bucks
    Posts
    9
    Thanks / Likes
    3

    Koi with swollen belly. Egg bound?

    Hi All,

    I have a 50cm Shiro Utsuri that I thought was male, but it appears to be swollen towards the back end around it’s vent. When I checked it over in bowl the swelling feels soft and the scales are not raised.

    Is anybody able to confirm if this koi looks egg bound from the attached pictures?

    My pond is 1500 gallons, with a drum filter and 300L of K1 in a moving bed. It is currently heated to 23 degrees.

    My colombo test kit is showing the following results for Ammonia, Nitrite and PH.

    Ammonia - 0 mg/l
    Nitrite - 0 mg/l
    PH - 8.5

    7BE2D515-0295-4D09-8E1B-0D0388D835B3.jpg
    70AE8DE4-9F66-4E23-91A8-1BE663FD2FB2.jpg
    7C8E12E5-102C-4C79-8D6B-59BA77EE3C59.jpg
    4F2B64BE-A70A-4EFF-BC21-B2DFD95C3045.jpg
    E24B99A4-9F79-4126-A6BF-161521B1A364.jpg



  2. #2
    Senior Member Rank = Rokusai Twhitenosugar's Avatar
    Join Date
    Apr 2020
    Location
    South East
    Posts
    439
    Thanks / Likes
    739
    I have the same issue on Shiro Utsuri as well.

    My understanding is an asymmetric swelling in that area is often a sign of an ovarian tumour rather than retention of eggs (which I understand is more likely to cause swelling on both sides).

    I'm intrigued to see what others say though, in case there is something I can do for mine.

    Sent from my SM-A520F using Tapatalk
    12,500L fibreglassed raised pond with window

  3. #3
    Senior Member Rank = Rokusai Twhitenosugar's Avatar
    Join Date
    Apr 2020
    Location
    South East
    Posts
    439
    Thanks / Likes
    739
    Looking closer at the pics it does seem to be affecting both sides of the fish, rather than just one.

    So ignore my last post.

    Sent from my SM-A520F using Tapatalk
    12,500L fibreglassed raised pond with window

  4. #4
    Junior Member Rank = Fry CR_KOI's Avatar
    Join Date
    Jun 2017
    Location
    High Wycombe, bucks
    Posts
    9
    Thanks / Likes
    3
    Quote Originally Posted by Twhitenosugar View Post
    Looking closer at the pics it does seem to be affecting both sides of the fish, rather than just one.

    So ignore my last post.

    Sent from my SM-A520F using Tapatalk
    Sorry to hear that you have a koi with a similar problem. Yes, it does seem to be swelling up on both sides.

    It has come as quite a shock to me as I could have sworn the fish was male based on its usual slender body shape and rough gill plates during the summer.

    I am hoping somebody has seen this before as I really do not know how to resolve the issue.

  5. #5
    Senior Member Rank = Rokusai Twhitenosugar's Avatar
    Join Date
    Apr 2020
    Location
    South East
    Posts
    439
    Thanks / Likes
    739
    Is it a good feeder? Have you always been heated?

    If its a greedy piggy and you were not heated, then it may well have just added bulk in that area.

    I understand that if koi gorge themselves on high protein/high oil foods when it's not warm enough e.g. under 18Cish, they're more like to grow gutty, rather than grow in length.

    If it is that, then a few months of reduced feeding (with Wheatgerm) over winter should reduce it.

    Sent from my SM-A520F using Tapatalk
    12,500L fibreglassed raised pond with window

  6. #6
    Junior Member Rank = Fry CR_KOI's Avatar
    Join Date
    Jun 2017
    Location
    High Wycombe, bucks
    Posts
    9
    Thanks / Likes
    3
    Quote Originally Posted by Twhitenosugar View Post
    Is it a good feeder? Have you always been heated?

    If its a greedy piggy and you were not heated, then it may well have just added bulk in that area.

    I understand that if koi gorge themselves on high protein/high oil foods when it's not warm enough e.g. under 18Cish, they're more like to grow gutty, rather than grow in length.

    If it is that, then a few months of reduced feeding (with Wheatgerm) over winter should reduce it.

    Sent from my SM-A520F using Tapatalk
    It’s still feeding as normal, grabs a few pellets at a time. The pond has not been below 21 degrees since summer.

    Really has me stumped. Last week I tried adding some spawning brushes but none of the other males were even remotely interested.

  7. #7
    Moderator Rank = Supreme Champion Feline's Avatar
    Join Date
    Aug 2013
    Location
    Somerset
    Posts
    5,912
    Thanks / Likes
    4334
    It’s more likely to be a tumour or cyst I’m afraid, which you’re not going to be able to do much about. You would need ultrasound to confirm this, but unless you’re considering surgery the diagnosis itself would be academic.

    If you get females with generally fat bellies then it’s a different matter- and you need to reconsider your feeding strategy if you’re causing them to make too many eggs they are not dropping, and also causing them to get fat. Many koi are very piggy and won’t always know what’s good for them in terms of eating, just like most humans

    People have opposing ideas on what’s best in terms of spawning their female koi.
    Some encourage spawning by doing a big water change and putting in the spawning ropes when they look like they are getting fruity in the late spring/early summer.
    Some remove the females a couple at a time to a safer vat with one male to reduce the risk of damage. Putting them into fresh water will often set them off the first night.
    Some have female only ponds and/or starve the fish for a while in winter to get them to resorb their eggs, and are very careful how hard they push feeding early in the season when they tend to use what they eat to make eggs rather than grow.
    Some people don’t think about spawning at all, and will lose the odd female fish to egg peritonitis from time to time.

    There is a pituitary hormone extract you can inject them with to make them drop eggs, but it’s hard to get hold of as not licensed in the UK (Ovaprim). I’ve been able to import some legally by applying for a special licence, but only because I can write a prescription for my own fish.

  8. Thanks Gazkoi Thanked / Liked this Post
 

 

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
All times are GMT +1. The time now is 07:19 AM. Online Koi Mag Forum
Powered by vBulletin® Version 4.2.3
Copyright © 2021 vBulletin Solutions, Inc. All rights reserved.

vBulletin Improved By vBFoster® (Lite Version), © UltimateScheme, Ltd.