Anthias Black Spot.

andre1879 · Jul 5, 2024

We have added a pair of Anthias in our tank for about three weeks. A male and female. The male seems to be a bit aggressive with her, and we’ve noticed a black spot on her underside and a what looks like a hole on her back. Not sure if the damage is from the male or if it’s a problem from fungal or parasite. In the picture you can see the black spot and the white spot on the back. Thanks for your help. Sorry the picture is slightly blurry. She wouldn’t sit still.

vetteguy53081 · Jul 5, 2024

andre1879 said:
We have added a pair of Anthias in our tank for about three weeks. A male and female. The male seems to be a bit aggressive with her, and we’ve noticed a black spot on her underside and a what looks like a hole on her back. Not sure if the damage is from the male or if it’s a problem from fungal or parasite. In the picture you can see the black spot and the white spot on the back. Thanks for your help. Sorry the picture is slightly blurry. She wouldn’t sit still.

This looks like an injury spot and Should heal on its own , However you will have to isolate the male or make a decision to relocate it as this will not heal with continued aggression.
Ruby Rally pro should help it heal and protect from infection safely to use even with coral

littlefoxx · Jul 5, 2024

Also with anthias the more females the happier he will be and less aggressive with them since there are more of them

Jay Hemdal · Jul 5, 2024

andre1879 said:
We have added a pair of Anthias in our tank for about three weeks. A male and female. The male seems to be a bit aggressive with her, and we’ve noticed a black spot on her underside and a what looks like a hole on her back. Not sure if the damage is from the male or if it’s a problem from fungal or parasite. In the picture you can see the black spot and the white spot on the back. Thanks for your help. Sorry the picture is slightly blurry. She wouldn’t sit still.

The lesion on the underside looks really serious - lots of tissue disruption. It could be Uronema, but more likely an internal fungal disease known as Icthyophonus. Neither of those issues are treatable though, so hopefully I’m wrong.