Clownfish with bump on anus

Sockcman · 2026-10-20T21:52:51-0400

A couple of days ago I noticed one of my clownfish had a bump where his anus is. Its hard to get a good picture of it but hopefully that helps.

Any idea what this is and if there's anything I can do to help?

Thank you!

Sockcman · 2026-10-20T21:54:51-0400

Maybe a better picture

Fish Fan · 2026-10-20T22:18:40-0400

Sockcman said:
Maybe a better picture

Is that a bump, or perhaps a piece of feces? In this last pic, that looks like feces to me, which is often just their diet, but if 'striggy' the could be a sign of internal parasites.

The fish looks quite robust to me otherwise. Do you notice anything else "off" with the behavior or appearance of this fish?

vetteguy53081 · 2026-10-20T22:44:35-0400

Sockcman said:
Maybe a better picture

This looks to be intestinal blockage or even constipation. Dont feed for 12-24 hours and see if bump subsides. In addition.... if blockage, feeding brine shrimp will help object pass through

Sockcman · 2026-10-21T02:25:15-0400

Fish Fan said:
Is that a bump, or perhaps a piece of feces? In this last pic, that looks like feces to me, which is often just their diet, but if 'striggy' the could be a sign of internal parasites.

The fish looks quite robust to me otherwise. Do you notice anything else "off" with the behavior or appearance of this fish?

Definitely not feces it's a clear bump but kinda hard to see in pictures. I've only had them for about a month (they were rehomed) but it's acting normal and still has a strong appetite.

Sockcman · 2026-10-21T02:26:27-0400

vetteguy53081 said:
This looks to be intestinal blockage or even constipation. Dont feed for 12-24 hours and see if bump subsides. In addition.... if blockage, feeding brine shrimp will help object pass through

Thank you for the advice, I fed spirulina brine shrimp today so will try going a day without feeding.

Any advice if it doesn't go away? Just feed small amounts of brine shrimp?

vetteguy53081 · 2026-10-21T07:16:24-0400

Sockcman said:
Thank you for the advice, I fed spirulina brine shrimp today so will try going a day without feeding.

Any advice if it doesn't go away? Just feed small amounts of brine shrimp?

May be worth a shot with kanamyacin (Kanaplex) but I know Canada is limited with meds