Tailspot Blenny Ailment

jtwill2011

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Hello all,

I have a Tailspot Blenny named Biscuit that’s looking a little worse for wear. I just noticed it tonight and am looking for any input on possible causes.


20251023_210349_12044F8A-17CC-43E9-B671-9539FAAA970E.png

20251023_210350_B3732F41-3F70-46C9-B374-BBE75247B4E5.png

20251023_210350_61205557-1D1F-4245-A748-7CFC13888FBE.png

20251023_210350_0F660E6B-2FAB-4D5B-830D-A2D5A46D28ED.png
It looks like some area of his head has a possible injury? Or sign of some ailment, his stomach is also showing signs of almost lines or ridges inside (that’s the best I can think to describe it).

Any help would be great! I’m new to saltwater fish but not fish in general, but I’m used to looking for freshwater illnesses and such.

Thank you!
 
Adding to say that he’s eating normally and is as active as usual. His diet consists of algae and frozen mysis, brine, and sometimes pellets.

His only other tank mates are a Banggai Cardinalfish and some hermit crab and snail cuc.
 
These are some of my favorite little fish. I'm sure the R2R fish medic guys will be along soon, but I'm following to see how this turns out. Good luck to you and your fish!
 
Last edited:
These are some of my favorite little fish. I'm sure the R2R fish medic guys will be along soon, but I'm following along to see how this turns out. Good luck to you and your fish!
Thank you! I absolutely adore him and he was a great addition to the tank
 
Hello all,

I have a Tailspot Blenny named Biscuit that’s looking a little worse for wear. I just noticed it tonight and am looking for any input on possible causes.


20251023_210349_12044F8A-17CC-43E9-B671-9539FAAA970E.png

20251023_210350_B3732F41-3F70-46C9-B374-BBE75247B4E5.png

20251023_210350_61205557-1D1F-4245-A748-7CFC13888FBE.png

20251023_210350_0F660E6B-2FAB-4D5B-830D-A2D5A46D28ED.png
It looks like some area of his head has a possible injury? Or sign of some ailment, his stomach is also showing signs of almost lines or ridges inside (that’s the best I can think to describe it).

Any help would be great! I’m new to saltwater fish but not fish in general, but I’m used to looking for freshwater illnesses and such.

Thank you!
This fish is awfully thin and appears to have a bacterial issue. Will need treatment in a separate tank using seachem neoplex.
Is fish eating at all and what foods are you offering it?
 
Hello all,

I have a Tailspot Blenny named Biscuit that’s looking a little worse for wear. I just noticed it tonight and am looking for any input on possible causes.


20251023_210349_12044F8A-17CC-43E9-B671-9539FAAA970E.png

20251023_210350_B3732F41-3F70-46C9-B374-BBE75247B4E5.png

20251023_210350_61205557-1D1F-4245-A748-7CFC13888FBE.png

20251023_210350_0F660E6B-2FAB-4D5B-830D-A2D5A46D28ED.png
It looks like some area of his head has a possible injury? Or sign of some ailment, his stomach is also showing signs of almost lines or ridges inside (that’s the best I can think to describe it).

Any help would be great! I’m new to saltwater fish but not fish in general, but I’m used to looking for freshwater illnesses and such.

Thank you!
This fish is awfully thin and appears to have a bacterial issue. Will need treatment in a separate tank using seachem neoplex.
Is fish eating at all and what foods are you offering it?
That was my initial thought as well, he is eating normally, I typically offer frozen mysis shrimp, frozen brine shrimp (both normal and spirulina), and new life spectrum pellets.

In fact, he just ate a full meal of frozen mysis about an hour ago.
 
That was my initial thought as well, he is eating normally, I typically offer frozen mysis shrimp, frozen brine shrimp (both normal and spirulina), and new life spectrum pellets.

In fact, he just ate a full meal of frozen mysis about an hour ago.

These blennies getting thin despite eating well is something that is seen pretty often. Once the fish has used muscle mass for energy, it begins working on the liver. That in turn causes widespread issues in the fish’s appearance.

Here is a thread I started about this issue:
https://www.reef2reef.com/threads/skinny-blenny-issue.922129/
 
That was my initial thought as well, he is eating normally, I typically offer frozen mysis shrimp, frozen brine shrimp (both normal and spirulina), and new life spectrum pellets.

In fact, he just ate a full meal of frozen mysis about an hour ago.

These blennies getting thin despite eating well is something that is seen pretty often. Once the fish has used muscle mass for energy, it begins working on the liver. That in turn causes widespread issues in the fish’s appearance.

Here is a thread I started about this issue:
https://www.reef2reef.com/threads/skinny-blenny-issue.922129/
That’s very interesting and good to know, I appreciate it!
 

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