- Joined
- Feb 20, 2020
- Messages
- 31
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- 15
- What state or country do you live in
- Virginia
This all started out as funny a few weeks ago when we noticed the bicolor blenny would take little nips at our foxface as he swam by. The blenny is so small that the foxface hardly reacted. However, in the past few days I've noticed my otherwise active and social foxface hanging out on the sand bed much of the day and showing less interest in seaweed. The times that our foxface was acting more normal he would go back into lethargic mode right after the blenny took another nip at him. The bicolor blenny doesn't nip at any of the other fish.
While these fish have been coexisting for many months in my tank, I did add a set of new fish approximately 12 days ago. So it is possible a pathogen came in with those fish, but the store i bought them from does a full copper quarantine. All other fish look and are acting fine.
Any thoughts on this? It occurs to me that the blenny bite might be poisonous. With him biting the foxface easily 5-10 times a day maybe the poison is stacking up and slowly killing our large foxface.
I may trap and remove the blenny in the next few days just to see if it helps.

While these fish have been coexisting for many months in my tank, I did add a set of new fish approximately 12 days ago. So it is possible a pathogen came in with those fish, but the store i bought them from does a full copper quarantine. All other fish look and are acting fine.
Any thoughts on this? It occurs to me that the blenny bite might be poisonous. With him biting the foxface easily 5-10 times a day maybe the poison is stacking up and slowly killing our large foxface.
I may trap and remove the blenny in the next few days just to see if it helps.


